The Pool Heating Specialists
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Free Delivery on Orders over £50

Waterco Electro Heat Ultra Low 22kw to 35kw Heat Pumps, Single & 3 Phase Models

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Optional Extras

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Free UK Delivery Over £50

UK Mainland Only (Excludes Highlands)

All Prices include VAT

The Waterco Ultra Low Range Provide Extended Season use and Operate down to Zero Centigrade

The Waterco Ultra Low products are assembled in Canada using mainly components from the USA.

The Waterco Ultra Low range operate at low temperatures and therefore provide extended season use.

All Waterco Ultra low heat pumps supplied by HeatPumps4Pools have the following features:-

  • Hot-Gas defrost system for low temperature operation
  • Operates down to 0c (although a minimum of +5c is recommended)
  • Titanium heat exchanger - The use of titanium for the heat exchanger leads to efficient heat transfer without any dangers of corrosion.
  • Digital control panel on all models
  • Green UK & European compliant refrigerant gas
  • Weatherproof ABS cabinets, UV resistant
  • Top mounted fan
  • Flow switch to turn off the unit when there is no water flow
  • Compressor protection time delay
  • Scroll compressor
  • 50mm/1.5" pipe connections
  • R410a refrigerant gas



electro_digital_display electro_plumbing_connections electro_heat_exchanger
Digital Controls

Easy Plumbing connections

Large Evaporator Area



Waterco heat pumps can be installed outdoors or in a pump-house or shed by using the through-the-wall vent kit (sold seperately).

Installation is straightforward. We can provide advice on installing your heat pump. We can also offer an installation service if required.

Please see our Installation pages for photographs of examples of pool heat pump installations and also the FAQ pages for more information


All Waterco products come with the following parts and labour warranty in the UK:-

  • 10-years warranty on the titanium heat exchanger
  • 3-years warranty on the compressor
  • 1 year parts and labour warranty on all other components (subject to terms and conditions)

Units shipped outside the UK are supplied with a parts-only warranty.

What size heat pump do I require for my pool?

Waterco's guide for the sizing of your heat pump is as per the table below:-

Waterco Ultra Low Sizing Chart

Many factors can affect the sizing of a heat pump for your pool. You are therefore strongly advised to contact us to get an accurate sizing recommendation for your particular pool.

Optional Extras

Bypass Kit Please see our Bypass Kits section section for more information.
Winter Cover

The unit comes with a lightweight winter cover, however we offer a heavy duty cover which will give you added and extended protection against the winter weather

Please see our Winter Cover section section for more information.


Prices include delivery to most UK postcodes. (excludes Scotland and some UK postcodes).

All Electro products are normally in stock in the UK and will be delivered in approx 1-week from order


We accept all major credit and debit cards, cheques and Bank Transfer

All major credit cards accepted

NB: We can offer a 1% discount on listed prices for payments by debit card or bank transfer as we do not need to pay credit card fees. Just choose bank transfer or cheque as the payment type when you checkout.

Product Literature

Please click the links below to download pdf brochures for Waterco products




If you need any assistance or advice as to which model would be best for your pool, please email us

for more information, also see our FAQs page

All items sold in accordance with our terms and conditions

for all enquiries, please contact us at

  • Model: Waterco Ultra Low 22kw-35kw
  • Shipping Weight: 59kgs
  • Manufactured by: Waterco