By Raypak



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 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.

?     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 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 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 5/23/2016by 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.


Review Summary

 (Average 4.67  out of 5 stars)
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