By Raypak



Model # 014941

Warranty 1 Year

Manufacturer Code P-R406A-EN-X #51

Alternate Part #'s 010105, 014941, P-R406A-EN-X #51, PR406AENX, RAY014941

Product Description

Enjoy your pool......Extend your swim season
Your pool and spa is a long-term investment that you, your family and friends will enjoy year after year. Now, there's an easier way to enjoy that investment more often, more reliably and more efficiently throughout the year...the Raypak Digital pool and spa heater.

Think about being able to use your pool or spa at the perfect comfort level even when Fall arrives...or when the first chill of Winter is felt in the wind...or in the Spring or Summer when evenings can turn chilly in a minute! Helping you get more enjoyment from your pool or spa is the smart idea behind the Raypak Digital.

Elevation: 0 Ft. – 2000 Ft. Click Here for High Altitude Pool Heaters


Digital Controls

  • Microprocessor Controlled Thermostat

The Raypak Digital gas heater comes with a microprocessor based thermostat control. This control allows you to set your pool or spa temperature precisely at your favorite setting just by pressing an up or down temperature control button. The Digital display gives you a constant read out of your pool water temperature. Just set it, and forget it! Truly simple.

  • Self Diagnostic

Troubleshooting a gas heater has never been easier. The Raypak Digital has on-board diagnostic controls that let the user and the service professional know what is going on with the heater at all times. In the event that you would ever have a problem with the heater, the digital display will show where the problem is in the control circuit. It's like having a service technician built into every heater!

  • Remote Compatible

The Raypak Digital is compatible with most major pool control and remote systems on the market today. Any two-wire or three-wire remote can connect to the Raypak Digital and be integrated into the pool control system of your choice.

Wind Resistant

  • Built-in Wind Resistant Design

The Raypak Digital has the best outdoor design in the market today. With over 50 years in designing and building gas heaters, Raypak has put all that experience into its newest heater design. No need for fans to combat drafting problems, the Raypak Digital was designed for outdoor installations with its exclusive low profile design. It is so thoughtfully and carefully designed it actually protects itself from the things that tend to stifle ordinary pool and spa heaters: falling leaves, wind, airborne debris, rain, downdrafts, updrafts, sleet, snow, etc. In fact it is so efficiently designed it ensures uninterrupted heating performance regardless of all but the most extreme weather conditions. Built Raypak tough. Built to last.


  • Smart Design

One look will tell you that the Raypak Digital is different! The look is contemporary. The design is advanced. And inside and out it's engineered to last. The attractive forest green and charcoal gray panels complement the latest pool and spa equipment designs. Raypak's original "pagoda top" design will keep the heater operating even in extreme wind conditions and downdrafts.

  • Polytuff Powder Coating

The Raypak Digital has a polyester coated, non-corrosive cabinet that is more durable than solventborne and waterborne coated metal cabinets. Every piece of sheet metal that gets powder coated goes through a 7-stage wash system making certain the powder paint has a perfect bond. Underneath the tough and beautiful finish you will find galvanized metal that offers superior rust prevention and years of durable service.

Non-Corrosive Waterways

  • Polymer Header

The Raypak Digital incorporates the latest in header design technology. Raypak's state-of-the-art engineering department utilized the latest in 3-D computer aided design to engineer the part for optimal performance. Polymer resin headers prevent rust stains from harming your pools surface giving you years of trouble-free swimming pleasure

  • Cupro-Nickel Fin Tube

This Raypak Digital heater has cupro-nickel fin tube heat exchangers for added protection against aggressive water chemistry. Although rare, there are certain applications, like health club spa's, where copper is just not the best choice. Cupro-nickel offers superior tolerance to bad and fluctuating water chemistry, thanks to a harder surface and thicker walled fin tube.

California Customers Please Note:  South Coast Air Quality Management District ( SCAQMD) Area of Jurisdiction REQUIRES a Low Nox Heater be installed.  The following 6 California Counties are affected:  Los Angeles, San Bernardino, Ventura, Orange, Riverside, & Kern. Installing a non-compliant heater in these counties will void the manufacturer's  warranty and could result in a fine from your local code enforcement.    Click here for RayPak Low Nox Heaters

This Limited Warranty does NOT apply; 
1. if the product has been moved from its original place of installation, or if the original 
owner no longer owns the property where the original installation was made; 
2. if the product is not properly installed with a pool or spa by a qualified licensed installer in 
accordance with applicable local codes and ordinances, good trade practices, and the 
manufacturer’s installation instructions; 
3. if the rating plate(s) or serial number(s) are altered or removed; 
4. if the product is modified in any way, or non-factory authorized accessories or other 
components are used in conjunction with the product; 
5. to damage, malfunctions or failures resulting from failure to properly install, operate or 
maintain the product in accordance with the manufacturer’s instructions; 
6. to damage, malfunctions or failures from abuse, act of nature, accident, fire, flood, freeze, 
lightning or the like; 
7. to damage, malfunctions or failures resulting from [or due to] connected system control 
8. performance problems caused by improper sizing of the heater or electric service 
voltage, wiring or fusing; 
9. use of any attachment, including any energy saving device not authorized by the 
10. to damage, malfunctions or failures from misuse or neglect, including but not limited to, 
freeze-ups, operating the heater with the cabinet door off, having flow restrictions or 
obstructions between the heater outlet and the pool/spa, or not maintaining a proper 
chemical balance (PH level must be between 7.4 and 7.8 and total alkalinity between 100 
and 150 PPM. Total dissolved solids (TDS) must be no greater than 3000 PPM)

Product Specifications

406,000 BTU
Digital Readout:
Heat Exchanger:
Plumbing Size:
2 in.
Special Feature:
Standard Emission
0-2,000 ft.

?     Asked on 3/3/2022by Jim

Ha I have a salt water, in-ground, vinyl liner pool in Louisville, Ky. Wanting to purchase a Raypak 400k salt-friendly or similar high-output heater to have installed. Our old heater was 20 years old and stopped working last year. Do you recommend a local, Louisville plumber that installs you heaters,? Jim Welch 661-619-8888

A  Answered on 3/3/2022 by InyoPools Product Specialist Rich N.

Hi Jim, we do not have any recommended contractor lists, but feel free to call Raypak at 805-278-5300 if you’re having trouble locating an installer in your area. If you give them your zip code, they will provide you with a local certified installer.

?     Asked on 5/4/2020by mike

does this unit come with: Polymer Header with ProTek Shield ?

A  Answered on 5/4/2020 by InyoPools Product Specialist Patrick P.

All of the Raypak heaters manufactured after Jan. 1st 2020 come with ProTek Shield.

?     Asked on 4/30/2020by John Logrando

What is a zinc anode Raypak unit as compared to a Cupro-nickel heater and are both usable for chlorine or salt systems

A  Answered on 4/30/2020 by InyoPools Product Specialist Patrick P.

Hi John a Zinc Anode is an item you purchase seperate from your heater. We put together this Video on How Zinc Anodes Work. Cupro-nickel is specific to the heater and is an alloy of copper that contains nickel and other strengthening elements. Because of this, it is highly resistant to corrosion in salt water. Pool heaters with a cupro-nickel heat exchanger are recommended for customers with a salt pool. Using one with a cupro-nickel heat exchanger will extend the life of your heater.

?     Asked on 4/21/2020by Kyle Hedges

Bought house with old Raypak RP2100 R185A heater that is shot. Pool is gunite, approximately 40,000 gallons, with an additional spa attachment. Currently standard chlorine pool, but looking to switch to saltwater in the future. Is this the right heater for this replacement, or is there another you would recommend?

A  Answered on 4/21/2020 by InyoPools Product Specialist Lennox H.

Hi, Kyle. The R185A unit was probably heating the spa only. If you would like to heat the pool also, then this R406A model will be sufficient. You will have to replace the gas line with a larger size etc to use this R406A model. Otherwise, the P-R206A-EN-X #51 will be the direct replacement. 

?     Asked on 4/15/2020by Alex Marrero

Does it come with ProTek Shield?

A  Answered on 10/23/2020 by InyoPools Product Specialist Eric J.

Good morning Alex, thank you for choosing inyo pools. this unit does not have the protek shield.

?     Asked on 4/2/2020by Michael Galgano

What is the BTU of this heater?

A  Answered on 4/2/2020 by InyoPools Product Specialist Patrick P.

This is a 406,000 BTU heater.

?     Asked on 2/7/2020by Michael A Tomlin

What size natural gas line does this heater require? Will it operate with the standard residential natural gas meter?

A  Answered on 2/7/2020 by InyoPools Product Specialist Lennox H.

Hi, Michael. The gas line size is based on the distance from the meter to the unit as illustrated in the Pipe Sizing Chart located in the Product Description. 

?     Asked on 10/27/2019by John Rambo

Is there any way to connect something to the gas line that will measure gas consumption so that I can keep an eye on it and not go over my monthly budget? It seems like there should be some kind of meter that could be connected.

A  Answered on 10/28/2019 by InyoPools Product Specialist Lennox H.

Hi, John. We do not offer such a product, however, they're available. 

?     Asked on 9/2/2019by Don

Do these ever go on sale?

A  Answered on 10/17/2019 by InyoPools Product Specialist Hector F.

Sometimes we will have holiday or season kick-off promotions. If you are on our email list you will definitely get notified. 

?     Asked on 8/30/2019by Don

I need LP Gas but like this heater model. Will it work with the LP orifice?

A  Answered on 9/1/2019 by InyoPools Product Specialist Lennox H.

Hi, Don. The LP version is P/N 014953

?     Asked on 8/6/2019by Cader A Bryson

We live in North Central Florida. Our in-ground pool is an 16'x 36' rectangle with a deep well of approximately 7' and a shallow of about 4'. Which size (in btu's) do you recommend? Thanks.

A  Answered on 8/6/2019 by InyoPools Product Specialist Joe S.

Good afternoon, based on the information yes that would be the heater size we would recommend if you have the gas line to support it. You would need to check with the installer on the meter and the gas line size.

?     Asked on 5/30/2019by Damian,TX

Hi, I have really old Raypak RP2100 c-r405-en BTU 399 SN# 9412107420. I have a salt water swimming pool with spa with total about 20,000 gal. 407,000 BTU seems high for that size pool- should I replace with this model to stay consistent or go with something smaller BTU?! I understand I need Cupro-Nickel due to saltwater..?! Thank you.


A  Answered on 5/30/2019 by InyoPools Product Specialist Lennox H.

Hi. You can replace your existing heater with a smaller, however, modifications will have to be made to the gas regulator and gas line. 

?     Asked on 5/17/2019by mike

I have an older Raypak model P-M406A-EN-C and I want to replace it with a Cupro Nickle Model 014941. Will I have t make any piping adjustments or is this simply a like for like in regards to install.

A  Answered on 10/15/2019 by InyoPools Product Specialist Steve M.

We apologize for the inconvenience, however, we have been unable to obtain that information from the manufacturer. We suggest calling them directly to see if you are able to find anything.

?     Asked on 5/13/2019by Dave

I live at 2600ft above sea level do i need the low nox version or will the standard version suffice? Thanks Dave

A  Answered on 5/14/2019 by InyoPools Product Specialist Michelle B.

Hello, You would need the low nox version.

?     Asked on 4/16/2019by GP

Is it OK to step the water plumbing down to 1.5" from 2"? I'm assuming yes, so long as the proper flow is maintained. Thanks,

A  Answered on 4/16/2019 by InyoPools Product Specialist Lennox H.

Hi, GP. That is correct.

?     Asked on 3/23/2019by Tom

I am debating on the 406 399,000 btu raypak with the copper or the one with the cupro-nickel 360,000 btu I have a 20x44 foot tri level pool with about 48,000 gallons. I use a slat generator. I want the higher btu's nut I think the nickel heat exchanger is better for the salt generator, even though my generator can operate on very low salt 2000ppm. What do you advise

A  Answered on 3/30/2019 by InyoPools Product Specialist Lennox H.

Hi, Tom. The Cupro-Nickel model is the best long term unit for your pool even though your generator can operate on very low salt. 

?     Asked on 1/9/2019by Joy

I have a raypak 336k btu heater, 7 years old and its leaking. My water chemistry has been well maintained. Any suggestions on how to prevent? Thinking about replacing with 406 k btu with cupro-nickel exchanger. Are the dimensions the same or would I have to modify? Also would the higher btu allow me to save energy by lowering the temp I maintain my indoor pool when not in use and dial it up a few hours before planning to use? Is there a smart phone compatible remote to allow adjusting remotely?

A  Answered on 1/11/2019 by InyoPools Product Specialist Lennox H.

Hi, Joy. It depends on where the unit is leaking from. The Header O-rings - 006713F could just be bad. The dimensions of both units are the same as for the water connections. The larger unit will heat your pool faster but it will also use more gas. There is not a stand-alone smart phone option for controlling just the heater. 

?     Asked on 5/2/2018by Dawn

Hi! We currently have a 406A EN C heater that is all rusted out. Is this a good replacement for our 20X40 in ground pool?

A  Answered on 5/2/2018 by InyoPools Product Specialist Hector F.

As long as yours is at standard geographic elevation then yes this is a good replacement unit. 

?     Asked on 4/18/2018by Rich Weiss

I have an existing Jandy RS4 IN HOUSE control, would I use the digital or millivolt heater. I will need the X version due to the salt water

A  Answered on 4/19/2018 by InyoPools Product Specialist Lennox H.

Hi, Rich. You can use either model. The electronic unit will give you more operating features.

?     Asked on 10/25/2017by Raul

I cook the master temp 400 can I use this heater for 25k salt pool in Los Angeles CA?

A  Answered on 10/26/2017 by InyoPools Product Specialist Lennox H.

Hi, Raul. You can use a Raypak 406,000 BTU's to heat a 25K  pool. You will need a Low Nox unit P-R407A-EN-C. The Low Nox units are not equipped with a Cupro-Nickel Heat Exchanger. 

?     Asked on 7/4/2017by Andy Daniels

Will the Compool TimeMaster (w/LX-10 power center) work the Raypak Heater 406,000 BTU's NG ELE W/ Cupro-Nickel Heat Exchanger – 014941?

A  Answered on 7/7/2017 by InyoPools Product Specialist Lennox H.

Hi, Andy. Yes, this Raypak Heater can be wired to the Compool TimeMaster Controller.

?     Asked on 5/17/2017by Jason

i currebtly have a 10 year old raypak p-m406a-en-c that is rusting out, will this heater be better and will be a drop in replacement?

A  Answered on 5/18/2017 by InyoPools Product Specialist Lennox H.

Hi, Jason. The Raypak P-R model heaters are a direct replacement to the Rheem P-M model heaters. This PR406AENX has a cupro-nickel heat exchanger which is better than the copper heat exchanger and will be a drop-in replacement for a residential standard application.

?     Asked on 2/1/2017by JOHN BUCK

Can I replace a Burham boiler with this one? The BTU rating is 399k on the Burnham and it is gas fired.

A  Answered on 2/2/2017 by InyoPools Product Specialist Scott W.

Is what you're replacing a residential propane or natural gas heater?

?     Asked on 11/19/2016by Chris

Is the control panel lockable or how would you suggest it be isolated - I rent out my property in Florida and I'm fairly sure some guests are putting my Hayward H250 into manual and putting on the pool heat without paying for it A key switch or something that electrocutes thieving hounds would be good ;-)

A  Answered on 11/21/2016 by InyoPools Product Specialist Adam Y.

Good morning Chris, There is not really a sure way or product that would work for you . Even if you went remote it can still be operated manually. only thing I can say is to put a locking door over display with a note saying for owners use only or remove the heater. no heater np problem.

?     Asked on 10/4/2016by Don

I have a R406A EP C ASME Pool Heater that I would like to replace. What newer unit would be the best replacement model?

A  Answered on 10/4/2016 by InyoPools Product Specialist Scott W.

The direct replacement for the one you have is part number 009287 which is a commercial propane heater. The cupro-nickel model that you would need to replace your current heater is part number 010221 and would have to be special ordered. If you like I can get the lead time and price information on that and email you a quote.

?     Asked on 9/27/2016by mike cramer

How high up from the ground is are the inlet and outlet pipes to the heater (exchanger)?

A  Answered on 9/29/2016 by InyoPools Product Specialist Scott W.

The plumbing on that heater is 26-5/8" from the ground.

?     Asked on 6/26/2016by Les Cushman

I would be using this @ elevation 5628 feet in Highlands Ranch, CO. Is this heater good @ this elevation? I also have a power vent on the heater I will be replacing Model P-R405A-EN, can I use it on this model or how is it vented? It is located in an enclosed room,, not outside.

A  Answered on 7/2/2016 by InyoPools Product Specialist Lennox H.

Hi Les, The Raypak Heater 406K (009223) is the high altitude version which is good for 2000-6000 ft. It does not have the curpro nickel heat exchanger.

?     Asked on 6/13/2016by brian

does this heater have a blower on it?

A  Answered on 6/14/2016 by InyoPools Product Specialist Alan M.

This heater is fan driven, operating by drawing in warm air to heat the pool water. I do not know of any blower parts driving the operation of this heater.

?     Asked on 6/8/2016by Chris

We are trying to compare this Raypak to another model. Can you tell me how this compares or is different from the Raypak RP2100 406k BTU Digital Pool Heater - Natural Gas (item sku: 31-RPD406N). I didn't see that you sell the RP2100, but if there is no difference then this one should be fine for us.

A  Answered on 6/9/2016 by InyoPools Product Specialist Patrick P.

Hi Chris, It looks like this is the exact same model as the Raypak 31-RPD406N however this unit has the upgraded heavy duty Cupro Nickel heat exchanger. If you want the standard heat exchange which comes on the 31-RPD406N then you will require the 009219 Raypak Heater Natural Gas 406,000 BTU's

?     Asked on 4/14/2016by Edwin Hiner

Making sure before I order. I have natural gas (City Gas in Omaha NE.) coming into the house. We use a salt water system. Our present raypac is about 12 years old and has started to rust out and is leaking. I believe it is 399000 btu. Which system do you suggest.

A  Answered on 4/15/2016 by InyoPools Product Specialist Lennox H.

Hi Edwin, This unit will be a suitable replacement for your current unit and for an saltwater pool.

?     Asked on 3/9/2015by Inyo Visitor

Can the configuration of the header & or the gas inlet be swapped from one side to the other? If this can be achieved, how simple of a task is this? Thanx, JJC

A  Answered on 3/10/2015 by InyoPools Product Specialist Robert M.

The headers/heat exchanger can be swapped from one side to the other. The gas connection cannot be swapped. The directions for swapping the heat exchanger/headers are on page 25 of the owner's manual.

?     Asked on 3/7/2015by wayne franks

What is the cabinet size on this heater? I need the foot print size. This is for indoor install.

A  Answered on 3/9/2015 by InyoPools Product Specialist Robert M.

The width is 29", the depth is 28", and the height is 38" (64-1/2" with drafthood).

?     Asked on 2/5/2015by Lan Nguyen

Is this model a LONOX heater? I live in Houston, Texas. The humidity is very high and need a heater appropriate for this climate.

A  Answered on 2/6/2015 by InyoPools Product Specialist Robert M.

Hello Lan - Model 014941 is not a LoNox heater. The LoNox model would be 010230. That model also has the cupro-nickel heat exchanger.

?     Asked on 10/18/2014by Inyo Visitor

Our Jandy burnt up because it overheats if the automatic timer shuts off the pool pump and does not have water flow through the heater. What heater would be best choice for Florida with an automatic timer on pool?

A  Answered on 10/18/2014 by InyoPools Product Specialist Patrick P.

I would suggest the Raypak series of heaters as they have an automatic water pressure switch. The water pressure switch detects when there is no flow going through the pool heater and turns the heater off. This switch ensures that the heater will not get damaged if the pump shuts off when the heater is in operation.

?     Asked on 10/10/2012by Guest

What is the difference between an Electronic and Millivolt ignition?

A  Answered on 10/10/2012 by InyoPools Product Specialist Patrick P.

The basic answer is that Millivolt is the old style of ignition, using a standing pilot light. While the electronic ignition uses a spark start system like a gas grill. Electronic ignitions are more efficient in gas usage and also are better suited for high wind areas where a pilot light might get extinguished.

?     Asked on 1/16/2012by Guest

Will a gas heater operate at the low speed of a dual speed motor?

A  Answered on 1/16/2012 by InyoPools Product Specialist Patrick P.

Probably not - Most gas heater will shut off at low GPM levels (20-40) to keep the heater cores from overheating - 20 for 200 BTUs, 40 for 400 BTUs. Depending on your pool system you might get these GPM levels at the low speed but generally these heaters must be run at the motor's high speed.


Est. Repair Time

2 to 4 hrs

Tools Needed

Screwdriver, Pliers, Adjustable Wrench, PVC glue

Needed a new pool heater for my 50,000 gal pool

Written on 5/3/2023 by Guest

Needed to get a good heater for pool to replace the old heat-exchange system that was in place when I bought our home. I installed the new heater from Inyo pools myself. I had an HVAC contractor extend our gas line to the new location for the heater and i prepared a good base for the new heater. Installation was easy and the new heater works great with my large salt pool. We purchased the cupro-nickel because it is more durable for a salt pool. Also installed a backwash valve between the heater and the salt generator to prevent salt water from backing up into the heater. Important to get heater level on the pad and make sure that you think through the process in attaching and extending PVC pool lines to and from the heater. This is not an easy plug and play and gas lines and water lines need to be lined up and installed properly. The process with Inyo Pools in purchasing the heater was easy and it was a great price.

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Est. Repair Time

Less than 1 hr

Tools Needed


Top cover was dented from shipping.

Written on 8/23/2021 by Guest

I called and spoke to Megan. She requested pictures of issue, which were sent. Egan then facilitated a prompt delivery of the new grill. Megan was very knowledgeable and very pleasant to deal with. A negative became a big positive. Great service!

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Est. Repair Time

1 to 2 hrs

Tools Needed

Screwdriver, Nut Drivers, Adjustable Wrench

2     0

old heater inoperative

Written on 7/17/2018 by Guest

replaced old Raypak heater with new unit - easy swap same size same plumbing

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