By Raypak



Model # 009219

Warranty 1 Year

Manufacturer Code P-R406A-EN-C #50

Alternate Part #'s 009219, P-R406A-EN-C #50, PR406AENC, RAY009219

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

406,000 BTU
Digital Readout:
0-2,000 ft.
Heat Exchanger:
Heater Type:
Natural Gas

?     Asked on 6/11/2006by Guest

What size natural gas line should be used on a Raypak 406,000 BTU heater?

A  Answered on 6/11/2006 by InyoPools Product Specialist Patrick P.

The 406,000 uses a minimum of 1" natural gas line and this would be if your run of pipe is 20 feet or less.  If your run of gas pipe is 21' - 95' you would require 1 1/4" pipe and if your run is between 96' and 215' you would require 1 1/2" gas pipe.

?     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.

?     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 8/30/2013by Guest

Can you provide me the dimensions for the Raypak RP Series model PR406AEN?

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

The Raypak 406 BTU RP2100 Series the cabinet measures are as follows: Width - 29 inches, Depth - 28 inches, Height - 38 inches. Any further technical data, like gas line size or voltage be found in the Raypak Specifications Guide

?     Asked on 8/30/2013by Guest

What size gas connection is needed for installation of the RayPak 406k BTU?

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

The RayPak 406k BTU heater requires a three quarter inch connection, whether propane or natural gas.


Est. Repair Time

4 to 8 hrs

Tools Needed

Screwdriver, Nut Drivers, Pliers, Adjustable Wrench, pipe wrench, power screw / bolt driver

2     0

Our 1998 Raypak pool heater died during the February ice storm in Texas

Written on 6/9/2021 by Guest

We had to shut off the gas at the curb as the valve by the heater was frozen. After shutting off the gas I run the stovetop until all gas was evacuated from the lines going into the house. Next we shut off power to the pool pumps which also power the heater's digital control board. From this point the job of disconnecting the old heater was not too bad. The worst part was getting the gas line disconnected. I guess that was to be expected as it had been in place for more than 20 years! Next the power lines and water lines were disconnected. From here we took the old unit to the curb where it was picked up by a salvage team the next day. The bottom of the old unit had rusted out so there was quite a mess to clean up before we could install the new unit.

We cut the new unit box off around the base following the instructions on the box, and removed the packing material. As hoped the new units connection points we identical to the old one with the minor exception of the wiring. This was great news as it meant that the water and gas lines were at the appropriate levels. Next we moved the new unit onto the slab were the old one was. We used all new 3/4 inch black iron pipes, unions, and a brass gas line valve to reconnect the gas line. A sediment trap was also added as per the installation manual recommendations. The joints we sealed with white gas line compound and checked for leaks. The water lines were able to be connected back up identically as they were on the original units. Lastly we connect the power in the same 240V configuration as was used on the old unit.

After turning on the gas and electric, we turned on the gas at the heater inlet and then the valve on the unit itself. Next we flipped the heater one, set a temperature higher than the waters current temperature, and it worked like a champ. We have a 15,000 gallon pool and this heater raises its temperature 3 to 4 degrees an hour. That's about twice as fast as the old one did before it died.

Were these instructions helpful? 


Est. Repair Time

2 to 4 hrs

Tools Needed

Screwdriver, Pipe wrench

1     0

15 year old R406A needed replacement

Written on 5/24/2021 by Guest

Closed the gas valve. Disconnected the gas pipe going to the Raypaks gas valve.
Disconnected the 240V wiring and low voltage control wiring to the control board.
Disconnected the two plumbing pipes.
Pushed the thing over and drug it off!
Gently rolled the new unit into place and lined it up with the water plumbing.
Hooked up the plumbing pipes first.
Hooked up the electrical. 240V was what I had at the pad. Used the Red/Black wires
Put in a new galvanized steel gas pipe from the local big box hardware store. Had to use a union to line it up properly. Put some pipe dope on the threads and took a 12" pipe wrench to it until it was tight.
Turned on the gas and sprayed the joins with "ammonia solution" to make sure there were no leaks also used my nose.
After that, I turned on the power breaker, hit the switch, and set it to a temperature and it fired up!
It's been a few days and still going good.

Were these instructions helpful? 


Est. Repair Time

4 to 8 hrs

Tools Needed

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

My old unit was rusting and not working

Written on 6/23/2020 by Guest

None of the new heaters had plumbing on the left side like my old one, so everything needed to be replumbed.

Were these instructions helpful? 


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