Spapak Electric Spa Heater / 5.5 KW - 001642

Model # 001642

By Raypak

  4.67 Average  



Model # 001642

Alternate Part #'s ELSR5522, RAY001642

Product Description

When electricity is the energy choice Raypak is the quality choice -- dependable, trouble-free, performance-proven - with corrosion-free, 100% copper and bronze waterways. Two compact models - 5.5kw and 11kw - built to last by the company renowned for reliability.

SpaPak spa/hot tub electric heaters furnish sustained heat to provide the maximum benefits of hydrotherapy...including stress reduction, relaxation and arthritis/pain relief.


  • Longer Life
    Because all waterways are corrosion-free copper and bronze - not aluminum. And, SpaPak features large size, heavy duty Incoloy heating elements that lasts far longer than ordinary water heating elements.
  • Troublefree
    Because SpaPak has extra quality and safety built-in - a pressure switch to prevent operation without water flow, a high limit temperature control to prevent overheating and a dependable quality thermostat.
  • Easy to Install
    With a compact design that fits into small spaces. Standard size, full flow 1-1/2" inlet and outlet connections are conveniently located. External current leak protectors are not required.
  • Sizing Guide

The following table shows the heating capability for each model in temperature rise per hour with a given amount of water. For example, the 11kw unit will raise the temperature of 450 gallons of water 10 degrees Fahrenheit in one hour. To determine the gallonage of your spa, multiply the surface area x average depth x 7.5.


APPLICABLE WARRANTY PERIODS If the Heater is installed in a single family residential dwelling, the Applicable Warranty Period for the Heater and its parts is one (1) year If the Heater is installed anywhere other than a single family residential dwelling, the


Applicable Warranty Period for the Heater and its parts is ninety (90) days. LABOR AND SHIPPING COSTS This Limited Warranty does not cover any travel time or other labor costs for repairs or replacements arising from defects in the Heater or its parts. This Limited Warranty does not cover any shipping costs to and from Raypak’s designated service provider or from the installation site.

Product Specifications

5.5 kW
240 V
1 1/2 in.
Dimension A:
16-1/8 in.
Dimension B:
8 in.
Dimension C:
4 in.
31 lbs.

?     Asked on 1/27/2023by Inyo Visitor

Any idea when you expect this back in stock?

A  Answered on 1/27/2023 by InyoPools Product Specialist Rich N.

The Spapak Electric Spa Heater / 5.5 KW - 001642 has been discontinued and replaced with the Raypak E3T Electric Digital 5.5kW Pool & Spa Heater, 18,767 BTU, Titanium Element - 017121

?     Asked on 11/8/2019by Inyo Visitor

my model 001642 will not turn on or heat, what will it be

A  Answered on 11/8/2019 by InyoPools Product Specialist Lennox H.

Hi. If the unit has power to is, check the water flow, high limit or the thermostat not calling for heat. Use the Spa-Pak Heater Installation Manual for more troubleshooting tips. 

?     Asked on 5/10/2019by Inyo Visitor

Can I use the Raypak #001642 pool heater with a salt water system?

A  Answered on 5/11/2019 by InyoPools Product Specialist Lennox H.

Hi. Yes, this heater is compatible with a salt water spa or hot tub. 

?     Asked on 8/14/2018by Helen

Does this heater interface with a freeze control unit? I have one that is connected to the propane heater I'm replacing, so I'm wondering how to connect the freeze control to the electric heater. Thanks.

A  Answered on 8/17/2018 by InyoPools Product Specialist Lennox H.

Hi, Helen. This heater is unable to be interfaced directly to a freeze control unit. You can set it up to where the pump is controlled by the freeze control ad the pump turns on the heater. 

?     Asked on 6/25/2018by Inyo Visitor

I’m interested in using this on a 8 ft round stock tank. Would this work?

A  Answered on 6/26/2018 by InyoPools Product Specialist Lennox H.

Hi. It's possible if it meets the installation requirements. The installation requirements are available in the Spa-Pak Heater Installation Manual

?     Asked on 4/24/2018by Mike

Will a RayPack electric spa heater / 5.5 KW be a good replacement system for a 500 gal. in-ground built hot tub with swimming pool mechanicals?

A  Answered on 4/25/2018 by InyoPools Product Specialist Lennox H.

Hi, Mike. This 5.5 KW Spapak Electric Spa Heater - 001642 will be sufficient for a 500 gallon hot tub. 

?     Asked on 3/17/2018by Lucian Marian

When I turn the temp. dial from cold to heat I can here the relay clicking,but the red indicator light does not come on.I do not know if the heather is working or not.What do I need to do ? Thanks.

A  Answered on 3/27/2018 by InyoPools Product Specialist Lennox H.

Hi, Lucian. The heater is not working if the indicator light is not illuminated. I would recommend troubleshooting the unit using the troubleshooting guide on page 9 of the Spa-Pak Heater Installation Manual

?     Asked on 9/16/2017by Inyo Visitor

We have a Teledyne Laars Electra Star Spa-Pak Heater TE-55. It appears that the heater element ELSR-552-2 is no longer operating. 1) Is the Raypak Flange Element 3"x3" 5.5 kw w/gasket (Mfg code 001801F) a direct replacement/fit into the existing tube? 2) If I were to replace the unit in its entirety, are the Raypak 001642 water inlet/outlet dimensions the same (10" center to center) - though on the side, rather than the rear of the cabinet as the Teeldyne?

A  Answered on 9/20/2017 by InyoPools Product Specialist Lennox H.

Hi. The Raypak Element will not replace the Laars TE-55 Heating Element. The Raypak unit has an 8" center to center inlet to outlet measurement which is located on the side of the unit. 

?     Asked on 4/25/2017by ron

how many amp cricut is required for the 5.5 unit

A  Answered on 4/26/2017 by InyoPools Product Specialist Lennox H.

Hi, Ron. This unit requires a 60 amp GFCI breaker.

?     Asked on 4/24/2017by ron

amps required

A  Answered on 4/25/2017 by InyoPools Product Specialist Joe S.

Good afternoon this will require a 50 amp breaker for the install. 240v Operation Both of the Raypak Electric Spa heaters operate with 240v single phase power. The model 552 draws about 23 amps @240v and the model 1102 draws about 46 amps @240v.

?     Asked on 2/20/2017by Inyo Visitor

How can you tell if elements are working to full capacity

A  Answered on 2/20/2017 by InyoPools Product Specialist Lennox H.

Hi, If the heater is heating the water then the element is working at capacity. The element will or it will not heat. it's not going to partially heat or work.

?     Asked on 10/14/2016by Inyo Visitor

Can I used this for my salt water spa. The spa is about 750 gallons.

A  Answered on 10/17/2016 by InyoPools Product Specialist Lennox H.

Hi, David. These units can be used with a saltwater spa, for your size spa I would recommend the  11KW ELS1102 unit.

?     Asked on 5/24/2016by hb

have model number r 1102 -2 was working now it is not doing nothing have any suggestions ?

A  Answered on 5/24/2016 by InyoPools Product Specialist Patrick P.

Hi hb, I would Contact Raypak Heaters directly and they should be able to troubleshoot your issue.

?     Asked on 5/23/2016by Inyo Visitor

Does this heater require special wiring? Would it work for a 27 ft round pool?

A  Answered on 5/29/2016 by InyoPools Product Specialist Alex V.

Hello, Unfortunately, this would not work on an above ground pool. This is for use with spas only.

?     Asked on 4/15/2016by fuzzy

can this heater be made to go to 130 deg. I want to use for a different purpose

A  Answered on 4/20/2016 by InyoPools Product Specialist Lennox H.

Hi Fuzzy, The factor setting will not allow this unit to heat that high.

?     Asked on 5/6/2015by Theresa

We have an above ground pool, approx 5,300 gallons. Would this heater be an OK way to warm up the pool?

A  Answered on 5/6/2015 by InyoPools Product Specialist Robert M.

Hello Theresa - The 5.5kW would be undersized. We would recommend Raypak model 001640. This is the 11kW electric heater.

?     Asked on 7/14/2012by Guest

How high can I set the water temperature to with this heater?

A  Answered on 7/14/2012 by InyoPools Product Specialist Patrick P.

The Raypak 001640 spa heater has a high limit thermostat is factory set at 104°F.

?     Asked on 9/29/2006by Guest

For the 5.5KW unit how much water flow is required through the heater(570gph)?

A  Answered on 9/29/2006 by InyoPools Product Specialist Patrick P.

The flow should be maintained above 15 GPM (900 GPH).  Failure to do so will cause the pressure switch to drop out, and the heater will become inoperative.


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