Electric Spa Heater 11 KW - CSPAXI11



Model # CSPAXI11

By Hayward Pool Products

  4.25 Average  



Model # CSPAXI11

Product Description

Hayward electric spa heaters contain all of the sophisticated features and capabilities of heaters twice their size. The electric heaters fit into compact spaces - even under spa skirts or steps. Like all Hayward heaters, they are easy to install and service.


  • Spas/hot tubs


  • 304 stainless steel tank
  • Service-ease design gives simple access to internal controls
  • Heater on indicator light 
  • UPS Shippable

Product Specifications

11 kW
240 V
1 1/2 in.

?     Asked on 8/24/2018 by Robert N. Beck

What is the model number fro electric heating elements in a Hayward CSPAXI 11 KW heater I asume there are two?

A     Answered on 8/24/2018 by InyoPools Product Specialist Lennox H.

Hi, Robert. You will need (2) of the 5.5 kW Element - CZXELE7623 and (2) Heater Element Gasket - CZXGKT7627

?     Asked on 7/8/2018 by Gary Allen Scott

I have just installed the c-spa-xi. check all connection I have power to the contactor as soon as I turn it on about 10 seconds the breaker trips. do you have a probable cause.

A     Answered on 7/9/2018 by InyoPools Product Specialist Lennox H.

Hi, Gary. Check the breaker size to make sure is it 60 amps. 

?     Asked on 6/26/2018 by Vance

I have a Hayward model CSPAXI11 HEATER that is leaking I think from the tank, replace with a new heater or fix it? at lease 6+yrs old

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

Hi, Vance. If the unit is leaking from inside, I'll recommend that you replace the entire unit. It will be wise to inspect the unit to find out where it is leaking from and to determine the cause of the leak so if you decide to replace it or possible repair it, it would not happen again.

?     Asked on 5/8/2018 by lee

hi, i have a 12ft by 24ft pool 4 ft deep ...will this heater be ok? regards lee

A     Answered on 5/8/2018 by InyoPools Product Specialist Kevin G.

Hello, I would recommend going with the HP21104T, the CSPAXI11.

?     Asked on 4/24/2018 by Larry

I Have a inground spa how far away can the heater be from the spa and function properly

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

Hi, Larry. Unfortunately, I was unable to locate the info. You can reference the Hayward Electric Spa Heaters Manual for installation requirements and specifications. 

?     Asked on 12/20/2017 by Kory Kendrick

The location of the heater is about 75' from my breaker panel. What gauge wire will I need to use?

A     Answered on 12/21/2017 by InyoPools Product Specialist Lennox H.

Hi, Kory. We're unable to provide you with that info. You will have to consult a licensed electrician. 

?     Asked on 6/14/2017 by

I have a real wooden hot tub holds about 500 gal. I need an electric heater and controls

A     Answered on 7/22/2017 by InyoPools Product Specialist Alex V.

Hello, As long as the spa pump is strong enough, you should be fine with this heater. 

?     Asked on 5/7/2017 by Avison Duke

what is the weight of this heater?

A     Answered on 5/7/2017 by InyoPools Product Specialist Lennox H.

Hi, Avison . We only have the shipping weight of this unit which is 14 lbs.

?     Asked on 1/8/2017 by OFFSHORE POOL BUILDERS

how many hours before warming the water in estimated 8 cubic meter of fresh water in my jacuzzi?

A     Answered on 1/9/2017 by InyoPools Product Specialist Adam Y.

Good morning, This number is based on a few different variables and is different case by case. Depending on starting water temp and air temp. Usually within an hour but sometimes more.

?     Asked on 12/23/2016 by Brent

My heater is leaking from below the internal water tank, is there a way to repair this or do I need to replace the unit?

A     Answered on 12/23/2016 by InyoPools Product Specialist Adam Y.

Good afternoon Brent, The tank is stainless steel so you would have to have it welded and pressure tested and there is no real guarantee that this will work. You can call Hayward and see if they have any recommendations @ 1-800-657-2287. I would recommend just replacing the unit.

?     Asked on 12/5/2016 by Withana

I need 36Kw Three phase heater.is it available with you?

A     Answered on 12/5/2016 by InyoPools Product Specialist Lennox H.

Hi, Withana. Unfortunately, we do not carry an electric heater that matches those specifications.

?     Asked on 11/11/2016 by

We have a 3,000 gallon salt water pool. I called Hayward and was told that a CSPAXi11 would be OK for our size pool. Double checking, (1) can we use/have installed a CSPAXi11 since we have a very small confined area for a heater, and we can only use electric. (2) what will we need besides a bypass and check valve when installing CSPAXi11. (3) does this heater come with double heating coils? and one real crazy question, (4) can we use two of these CAPAXi11 side by side for faster heating?

A     Answered on 11/11/2016 by InyoPools Product Specialist Lennox H.

Hi, The Hayward CSPAXI11 unit will be able to heater your pool. This unit will be fine if you have limited space and will require a dedicated 50 amp for each unit. You can install multiple units side by side for faster heating and this unit only has one heating coil.

?     Asked on 9/6/2016 by cynthia

my pool is 50,000 gallons. is this the right heater? do you have the right heater (electric)?

A     Answered on 9/12/2016 by InyoPools Product Specialist Scott W.

For a 50,000 gallon pool you will want a bigger unit. If you are wanting electric, a heat pump will be the way to go. I would recommend one that is at least 130k BTU's. So the RayPak 133k, the Hayward 140k, or the Pentair 140k heat pumps would be the ones you want to look at.

?     Asked on 6/29/2016 by

hi the 240 volt equal to 2 live line and each line equal 120 volt ? or 1 live and 1 neutral equal 220 ? can i put transformer 3 phase to convert to 1 phase ? because 46 amp too high,i dont have 50 amp breaker ?

A     Answered on 6/29/2016 by InyoPools Product Specialist Alan M.

This unit uses a straight 220v electrical connection. You will need to contact the manufacturer Hayward Pool Products at 908-355-7995 for the specific wiring questions you have asked.

?     Asked on 6/19/2016 by Guisselle

Will your heater work on an above ground pool 12'x42"? Thank you

A     Answered on 6/19/2016 by InyoPools Product Specialist Alex V.

Guisselle, This will not work on an above ground pool.

?     Asked on 6/16/2016 by

What size are the outlets?

A     Answered on 6/16/2016 by InyoPools Product Specialist Patrick P.

These outlets are 1-1/2".

?     Asked on 4/6/2016 by Michael

We are building a new 1600 gallon spa. Will this heater work for this size? We want to electric because we have solar. Thanks

A     Answered on 4/6/2016 by InyoPools Product Specialist Hector F.

Yes this heater will work well for this size spa.

?     Asked on 3/1/2016 by Joe Maloney

Is there an DIY video on installation?

A     Answered on 3/2/2016 by InyoPools Product Specialist Lennox H.

Hi Joe, Their is not an DIY installation video available for this unit, you would have to follow the installation instructions provided in the Hayward Electric Spa Heaters Manual.

?     Asked on 11/28/2014 by jay

What happens if I use this heater with my saltwater spa? Thanks

A     Answered on 12/2/2014 by InyoPools Product Specialist Alex V.

Jay, A salt system would corrode the "guts" of the quicker than normal. You will want to install a check valve in between the salt system and the heater to help prevent this.

?     Asked on 10/19/2014 by jp

What size circuit breaker is required for this unit?

A     Answered on 10/19/2014 by InyoPools Product Specialist Patrick P.

This heater requires a 60 amp breaker with #6 wire.

?     Asked on 9/26/2014 by Guest

I have a 14,000 gallon inground pool. Will the CSPAXI11 be sufficient?

A     Answered on 9/26/2014 by InyoPools Product Specialist Patrick P.

No, the CSPAXI11 would not be sufficient. Your size pool would require something like the 24kw Coates heater. The model number is 12424CPH.

?     Asked on 1/23/2013 by Guest

Can this heater be used in an in ground swimming pool?

A     Answered on 1/23/2013 by InyoPools Product Specialist Patrick P.

The CSPAXI11 can be used in a swimming pool, but it will take the heater a while to reach the desired temperature. You will be better off buying a larger sized gas/propane heater.

?     Asked on 1/23/2013 by Guest

Do you sell a replacement element for the Hayward CSPAXI11?

A     Answered on 1/23/2013 by InyoPools Product Specialist Patrick P.

Yes, for the 11kw Hayward CSPAXI11, you would need 2 of the 9280-15.

?     Asked on 12/31/2012 by Guest

What is the maximum flow rating for the Hayward CSPAXI11?

A     Answered on 12/31/2012 by InyoPools Product Specialist Patrick P.

The maximum flow rating is 70 gallons per minute. Anything over 70 gpm requires an external bypass.

?     Asked on 8/26/2012 by Guest

Can this Hayward heater be used on an 18' round above ground pool?

A     Answered on 8/26/2012 by InyoPools Product Specialist Patrick P.

Yes the CSPAXI11 heater can be used on an above ground pool.

?     Asked on 2/3/2012 by Guest

Can this heater be used outdoors?

A     Answered on 2/3/2012 by InyoPools Product Specialist Patrick P.

According to Hayward, this spa heater is rated for both indoor and outdoor use.

?     Asked on 5/10/2009 by Guest

What is the size and inlet sizes of these units?

A     Answered on 5/10/2009 by InyoPools Product Specialist Patrick P.

The inlet size on this heater is designed for 1.5" pipe. The heater measures 11 5/8" Tall X 6 1/4" Wide X 6 5/8" Deep.


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