By Raypak



Model # 009218

Warranty 1 Year

Manufacturer Code P-R336A-EN-C #50

Alternate Part #'s 009218, P-R336A-EN-C #50, PR336AENC, RAY009218

Product Description

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 heaters.


  • Digital control with liquid crystal display (LCD) for temperature selection and heater settings

  • Capron resin headers prevent rust stains from harming pool surface

  • Plumb directly from provided 2" PVC threaded union

  • Smart microprocessor controls diagnostic read-out and continuously monitors operating status

  • Completely field serviceable

  • Small footprint

  • High efficiency

  • Guaranteed high wind reliability

  • Looks smart and works smart

  • Thermal Efficiency of 83% 

  • 1 Year Warranty

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


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


Raypak Pool Heater DimensionsRaypak Pool Heater Dimensions

Raypak Heater Dimensions


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

336,000 BTU
Digital Readout:
0-2,000 ft.
Heat Exchanger:
Special Feature:
Standard Emission

?     Asked on 12/28/2021by Brian Starnes

I have a pool heater that is a mini max purex model #400. Will the R336a be a compatible replacement.

A  Answered on 12/28/2021 by InyoPools Product Specialist Joe S.

Hello Brian, yes you can with the 009218 NG 336 unit or the RP2100 Digital Heater - R406A - Copper - Natural Gas - P-R406A-EN-C #50 009219.

?     Asked on 11/8/2021by Frederick Comrie

Can the heat exchanger be repaired or it has to be replaced what is the warranty on this

A  Answered on 11/11/2021 by InyoPools Product Specialist Rich N.

Hi Frederick, these heaters have a 1-year warranty when installed professionally. Generally, the heat exchangers get replaced if they have an issue.     

?     Asked on 5/11/2021by Inyo Visitor

I need a replacement digital readout for Raypak R336A. Where can I get one?

A  Answered on 5/13/2021 by InyoPools Product Specialist Patrick P.

You may purchase that part from us through this link here - Raypak 336A Digital Display and PCB

?     Asked on 2/3/2021by Michael Ferreira

My pool is salt water, can I run a heater with salt water? I only need it for a month in spring to heat up, because in texas the air goes to 90 by march, but the water takes a month as it lags

A  Answered on 2/3/2021 by InyoPools Product Specialist Hector F.

Hi Michael, when using a heater on a saltwater swimming pool you will want to use a cupro-nickel model so the exchanger does not fail prematurely due to the corrosiveness of the salt. Here is a guide that we put together called "Sizing Your Pool Heater" that may also assist. 

?     Asked on 4/28/2020by Christine

We currently have a Lorrs 325,000 BTU Natural gas heater that is 18 years old and does not work. We are looking to replace it with the Raypak 336000 btu is this compatIble and an easy switch ?

A  Answered on 4/28/2020 by InyoPools Product Specialist Patrick P.

Hi Christine, Yes these would be compatible heaters. You will have a little bit of re-plumbing as the plumbing ports are not in the exact same location.

?     Asked on 2/26/2020by Roy Brooks

I have a Raypak 2100 unit now, how do I determine what size it is? I want to replace the unit, if I purchase another Raypak will the plumbing line up?

A  Answered on 2/27/2020 by InyoPools Product Specialist Lennox H.

Hi, Roy. You will have to locate the unit's service tag to determine the model and or the size of your unit. The plumbing will line up if your unit was manufactured between 11/01/04-Current.

?     Asked on 5/31/2019by Inyo Visitor

Is this a commercial natural gas heater? Is this the proper size (BTU) for a 50,000 gallon pool?

A  Answered on 10/2/2019 by InyoPools Product Specialist Steve M.

No, the Raypak RP2100 Heater 336,000 BTU NG ELE - PR336AEN is not a commercial unit. 

?     Asked on 5/15/2019by Dave

We live in South Jersey and had a Raypak 336A that lasted 12 years before the bottom rusted out. We are looking at a Raypak RP2100, 336,000 BTU unit. Will the RP2100 be remote compatible just like our 336A was. Also what is the manufatcure's warranty on the RP2100?

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

Dave, yes, the Raypak RP2100 Heater 336,000 BTU NG ELE - PR336AEN should still be compatible with the existing remote control system. There is a 1-year warranty from the date of purchase from the manufacturer. The warranty will cover you for parts but not labor. 

?     Asked on 6/15/2018by Inyo Visitor

When buying a replacement swimming pool heater, do you go by the BTU input or the BTU output?

A  Answered on 6/16/2018 by InyoPools Product Specialist Lennox H.

Hi. The heaters are sized using the BTU Input/output rating. The output rating determines the performance of the heater and the heating time. 

?     Asked on 5/28/2018by Inyo Visitor

I have a 33 foot round above ground pool. I currently have a rp2100 model P-R265 A which needs to be replaced. What model Rapak heater would be the correct size for my pool?

A  Answered on 5/31/2018 by InyoPools Product Specialist Lennox H.

Hi. The P-R266A model will be the correct drop-in replacement to the unit you have. If you want to go with a higher BTU unit which will heat your pool faster you can. This P-R336A or the P-R406A model will be sufficient, you will also have to increase your gas line too. 

?     Asked on 5/24/2018by Inyo Visitor

what is the price of a pc board fora406 model

A  Answered on 5/26/2018 by InyoPools Product Specialist Lennox H.

Hi. If your unit was manufactured prior to Oct 2004 you'll need Part # 010253F after Part # 013464F

?     Asked on 5/18/2018by tom

what raypak swimming pool heater reaplces the rp2100

A  Answered on 5/18/2018 by InyoPools Product Specialist Lennox H.

Hi, Tom. This unit is part of the RP2100 Series. It can be used to replace an older version with the same specifications. 

?     Asked on 5/17/2018by Scott

Can the electrical wiring be switched to the other side as well?

A  Answered on 5/17/2018 by InyoPools Product Specialist Lennox H.

Hi, Scott. The electrical connection can be switched from the right side to the left side of the unit. See page 26 of the Raypak Owners/Instructions Manual

?     Asked on 3/4/2018by Sherry Bell

The current heater I have has all of the pipe connections on the left side of the unit and all of these have the connectors on the right. Am I able to get one with the connectors on the left so it lines up with the pipes coming from my motor and filter?

A  Answered on 3/5/2018 by InyoPools Product Specialist Lennox H.

Hi, Sherry. All of these units come with the water connections on the right. They can be changed to the left, this will have to be done by an authorized technician. 

?     Asked on 6/28/2017by linda

how far does the pool heater have to be from the house - huntington ny

A  Answered on 6/29/2017 by InyoPools Product Specialist Joe S.

For U.S. installations, the point from where the flue products exit the heater must be a minimum of 4 ft below, 4 ft horizontally from, or 1 ft above any door, window or gravity inlet into any building. The top surface of the heater shall be at least 3 ft above any forced air inlet, or intake ducts located within 10 ft horizontally

?     Asked on 6/22/2017by Gary in San Diego

What are the dimensions of this heater? I'm wondering if it will fit in my pump shed.

A  Answered on 6/22/2017 by InyoPools Product Specialist Hector F.

Here is the technical data for these units including dimensions.

?     Asked on 6/18/2017by Ron

Just bought (from you)received and installed PR336AEN in my 10 x 12 shed (replaced a laars) I have an indoor 8" stack from old unit, but see I need the Stack adapter and outer stack adapter for this unit. My question is, being its in a shed with ventilation Do I really need to use the chiminy at all ? Tell me why I would need this. Thank you

A  Answered on 6/20/2017 by InyoPools Product Specialist Lennox H.

Hi, Ron. You would need the Raypak R366A/R367 Indoor Stack Kit - 009840 to get rid of the toxic fumes that the unit releases. You do not want to have the fumes trapped in an enclosed area, Although it may be ventilated it may not be adequate.

?     Asked on 6/6/2017by Inyo Visitor

I am considering your 336 BTU heater. My pool heater sits to the right of my pump as you face. All your pictures show the hook ups on the right side of heater. Are they available with the hook ups on the left side of heater as you face?

A  Answered on 6/8/2017 by Product Owner

Yes, the heat exchange can be flipped from the right side to the left side. Check out page 24 of the owner's manual for details. http://cdn.globalimageserver.com/fetchDocument.aspx?id=9858dad5-021a-4216-b0d5-1e29edd2f913

?     Asked on 5/30/2017by Don Lehmann

Can I use an Aqualink RS4 with this unit?

A  Answered on 5/31/2017 by InyoPools Product Specialist Stacey M.

Hello, You can hook this directly to this with power supply, but you will not be able to control or adjust temperatures.

?     Asked on 5/17/2017by Pat

I have an old Raypak RP 2100 that I am looking to replace. Is this a drop in replacement? What is delivery time to MA?

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

Hi, Pat. This unit is the same as the Raypak RP2100 series units. Delivery to MA can take 3-5 business days.

?     Asked on 4/28/2017by Rob

What type of electric does the raypak 336000 run of off? Also, if I read correctly 3/4" gass feed under 20' should be enough gass to run it correctly? I am eager to make this purchase so can you please let me know asap Thanks!

A  Answered on 4/28/2017 by InyoPools Product Specialist Lennox H.

Hi, Rob. This unit can be wired for 120 or 240 volts. A 3/4" gas line can be used for a run that is under 20 feet.

?     Asked on 4/21/2017by Dave S.

Is the Raypak 009218 (P-R336A-EN-C) a drop in replacement for my old broken heater which is a Raypak P-R335A-EN?

A  Answered on 4/24/2017 by InyoPools Product Specialist Scott W.

Yes, that is a drop in replacement for your old RayPak heater.

?     Asked on 4/14/2017by DAVID ALLEN TEMPERATURE TECHS LLC

Do you carry the CR336EN version also and if so what is the cost and lead time for shipping,thanks David.

A  Answered on 4/14/2017 by InyoPools Product Specialist Scott W.

For the RayPak heaters we carry the standard, cupro-nickel, high altitude, low nox, and commerical models all of which are usually in stock and usually ship out a day or two after the order is placed.

?     Asked on 5/3/2016by Mark

What is the heat exchanger made of? And what is the warranty?

A  Answered on 5/3/2016 by InyoPools Product Specialist Hector F.

The exchanger on this model is made of copper and the warranty is one year per the manufacturer's policy that you can view here.

?     Asked on 4/24/2016by D

I have a Raypak Model P-R336A-EN-X and I am looking for a simple remote to control the pool heater and adjust the pool water temp from inside the house. Can you recommend a simple remote that I can use just for the pool heater? Thanks

A  Answered on 4/26/2016 by InyoPools Product Specialist Lennox H.

Hi D, Unfortunately, there is not a system available that can do what you want. You'll need to install a Pool Automation System.

?     Asked on 4/1/2016by bob

how loud is the raypak 330,00 btu heater,my pool pump,old heater is about 15ft from my pool spa, i'm,worried about noise ,thanks

A  Answered on 4/1/2016 by InyoPools Product Specialist Alan M.

Hello Bob, The Raypak Heater 336000 BTU NG ELE has a decibel level of 50-55 dBA.

?     Asked on 3/26/2016by Frank

What size heater for 30,000 gal inground concrete pool 20x40 and what is average aprox cost to heat with natural gas in northern NJ

A  Answered on 3/28/2016 by InyoPools Product Specialist Lennox H.

Hi Frank, You will need the Raypak Heater 406,000 BTU NG ELE for your size pool, You can review our How Much Does it Cost to Run My Pool Heater? Blog to calculate heating cost.

?     Asked on 2/23/2016by Frank Meza

will this heat a spa and pool. Does it need a remote module to control from the spa

A  Answered on 2/25/2016 by InyoPools Product Specialist Andy O.

Hello Frank, You can use the 009218 Raypak Heater 336000 BTU NG ELE can be used to heat a pool and spa. If you would like to control this with a wireless remote you would need some sort of automation system.

?     Asked on 2/20/2016by John

My current pool heater is 265k BTU (Raypak P-R265A-EN), is 15 years old and didn't work all last season, so I'd rather replace than repair. I was thinking of going up one model because I don't have a cover and it can be hard to get the pool temp above 80 degrees when the nights are cool in May and September. Will I use a lot more gas heating my pool if I replace it with the 336K BTU model instead of the 266K BTU model? Thank you.

A  Answered on 2/24/2016 by InyoPools Product Specialist Lennox H.

Hi John, Yes you would consume more gas with larger size unit. The 336 unit will also heat the pool faster than the 265. I would highly recommend using a Solar Cover or Liquid Cover to prevent water evaporation and heat lost which will save you money when it comes to heating your pool.

?     Asked on 7/3/2015by Len

I just purchased a your Raypak 336000 BTU NG ELE heater. I live in New Jersey and my question is: should I place a cover over the heater during the winter months? If so, do you know where I can purchase one that will fit this heater. I thank you in advance for your assistance in this matter...... Len

A  Answered on 7/5/2015 by InyoPools Product Specialist Lennox H.

Hi Len, It would be good to cover your heater during the winter months. The Pool Heater Cover-One Size Fits Most will work with the RayPak heaters.

?     Asked on 7/1/2015by VIC


A  Answered on 7/1/2015 by InyoPools Product Specialist Wes B.

Hello Vic, It could be a few different problems. To properly troubleshoot the issue I would contact Raypac at 805-278-5300 or have a pool company come out to look at the heater.

?     Asked on 6/22/2015by Len

What is the difference between the Raypak 336000 NG ELE and the Raypak 406000 NG ELE other then the price and BTU? Thanks... Len

A  Answered on 6/23/2015 by InyoPools Product Specialist Lennox H.

Hi Len, The Raypak 406000 NG ELE unit will heater your pool or spa faster than the Raypak 336000 NG ELE unit because it has a higher BTU output.

?     Asked on 6/22/2015by Len

Do you sell the Raypak 399,000 BTU NG ELE and if so, what is the cost for this model? Thank you in advance..... Len

A  Answered on 6/22/2015 by InyoPools Product Specialist Dennis R.

Len, We do not sell the Raypak 399,000 BTU NG ELE heater but we do sell an equivalent  Raypak Heater 406,000 BTU NG ELE heater for $1,899.99 with free shipping.

?     Asked on 4/19/2015by Wally

My heater is about 85' from the gas supply and my existing line is 1", the pool holds about 38,000 gallons, which heater could I use and not have to dig up the old line, it's under the concrete pool deck!

A  Answered on 4/20/2015 by InyoPools Product Specialist Patrick P.

Hi Wally, The largest BTU heater you could go with on a 1" line at 85' would be the Raypak 206,000 BTU Model as this heater can be used on a 1" line up to 90'.

?     Asked on 11/6/2014by Paul Flickinger

How long would it take to get this item?

A  Answered on 11/7/2014 by InyoPools Product Specialist Robert M.

Hello Paul - The delivery time would be 7-10 business days.

?     Asked on 9/30/2014by Guest

What is involved with electrical hookup?

A  Answered on 9/30/2014 by InyoPools Product Specialist Patrick P.

We can get you the instructions for the installation, but to keep the heater under warranty you would have to have it installed by a licensed electrician.

?     Asked on 8/30/2013by Guest

What is the amp draw for RayPak RP series digital display?

A  Answered on 8/30/2013 by InyoPools Product Specialist Patrick P.

The RP series draw 4 amps on 120 volts and 2 amps on 240 voltage.

?     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

1 to 2 hrs

Tools Needed

had installed professionally

1     0

huge pool, bad advise from pools guys on how to heat and not to heat!

Written on 4/26/2022 by Guest

actually my success story is that I did my own reaseach then called a close friend who buys from INYO and highly recommended them. So, after talking at lenghth with the INYO rep, he answered all my questions and educated me about other fact concerning these products I was buying. He was thorough, informative, extremely polite and personable! The process was easy! The delivery was sooner than I expected and came off without a hitch! Will definatly use INYO pools for all my pool needs! Thank you guys, you are awesome!

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Est. Repair Time

4 to 8 hrs

Tools Needed

Screwdriver, Nut Drivers, Pliers, Socket Set, Wrench Set, Adjustable Wrench, Pipe Wrench

No Issues, but the unit is heavy.

Written on 3/21/2021 by Guest

Removed old 400lbs pool heater.
Cleaned concrete pool equipment pad.
Installed pool heater on pad (its 300lbs or so. Two person job with an appliance dollie).
Wired unit for 220v. (it will accept 120v or 220v 3wire or 4 wire)
Plumbed natural gas and added a t-trap. Tested gas lines and fittings for leaks with soapy water.
Plumbed in pvc water lines.
Lubed water head orings with pool lubed, and snugged down the supplied quick disconnect unions.

Took $90 or so in additional pvc unions, gas line and gas fittings, gas line sealer, pvc primer and glue.
Four trips to the home improvement store.

Removal of old pool heater, Install time with trips to the store, about 5 or 6 hours on a Saturday afternoon.

Fired up the heater and enjoyed a 101 degree night in the spa.
This pool heater is so quiet compared to my old Larrs.

Were these instructions helpful? 


Est. Repair Time

2 to 4 hrs

Tools Needed

Screwdriver, Pliers, Socket Set, Wrench Set

Old 15 year old ray pak died

Written on 8/23/2020 by Guest

Replaced heater with new similar size Raypak. Water temp rose 15 degrees within a day. Now my swim is relaxing.

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Est. Repair Time

1 to 2 hrs

Tools Needed

Screwdriver, Adjustable Wrench

1     0

Fed up with Jandy equipment and heater repairs

Written on 4/24/2020 by Guest

I spent $100 here and there on replacement parts for my Jandy LXi400. It started firing up but cut out. I could not find the issue. I was not about to spend hundreds on a service call.

I read about heaters. I was impressed by Raypak reviews and standards. I am a little annoyed about there being no warranty for a self install - I mean why unless any fault is caused by the install!

Anyway. The delivery driver, although curbside delivery, helped me take it to the pool shed. Next day, I simply attached the half inch gas pipe (I had to buy a 2 foot piece since the gas valve is set farther back than Jandy) and wired TWO wires into the power of my Jandy aqualink power unit - its a dream.

It took about an hour. SOOO much better. Water heats great. Works with my Jandy remote. No issues at all. I love it. I have, and will continue to recommend both Raypak and Inyo.

Were these instructions helpful? 


Est. Repair Time

Less than 1 hr

Tools Needed

Don't know. My son installed it

My raypak heater was not repairable. The entire bottom was rusted out

Written on 6/21/2018 by Guest

I called customer service and ordered a replacement. Customer service rep was courteous and the transaction was quick. You can't beat their prices with free shipping it was $700 cheaper than a quote from a local pool store! Shipping was quick too. Hook it right up with minimal effort and we're good to go. Thank you INYOPools!!!

Were these instructions helpful? 


Est. Repair Time

2 to 4 hrs

Tools Needed

Screwdriver, Socket Set, Adjustable Wrench

4     0

17 yr. Old Raypak heater stopped working.

Written on 5/3/2017 by Guest

Ordered the same sized raypack from inyo pools at a great price. The size and hookups were the same as the old one so no new plumbing was necessary. My biggest concern was that the company warranty would not be allowed unless installation was done by a licensed contractor. Since the heaters were basically identical, I decided to do it myself. Out with the old, in with the new. Took pictures of the old electrical hookups and installation was easy. New O- rings and the plumbing was done. Everything matched up perfectly. Opened the pool the next day and crossed my fingers when I turned on the heater. Two sparks and it kicked right in.
The price was 300.00 less than any other pool stores for the same unit and installation by a dealer would have been an additional 300.00 or more. I just opened my pool this year (2nd for the heater) and it kicked in after cleaning out the gas tube. It seems spiders build webs over the winter and sometimes prevent gas from flowing. Cleaned the line and heater kicked in. Very happy.

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Review Summary

 (Average 4.95  out of 5 stars)
17 Rating
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