Isotherm Hot Water Tanks - SPA40 WTRHTR11G750W 115VSMX Na | 6P4023SPA0003
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You have 30 days to request a return. All sale items are final sale.
Isotemp SPA 40 Marine Water Heater
The Isotherm Isotemp SPA 40, part 6P4023SPA0003, stores 40 litres of hot water, approximately 11 US gallons. It combines a 115 V electric heating element with an engine-coolant heat exchanger.
Key Features
- 115 V AC, 750 W electric element.
- AISI 316 stainless-steel inner tank with polypropylene outer casing.
- Insulated tank and 6 bar safety valve.
- Includes a thermostatic mixing valve for controlling delivered hot-water temperature.
Installation Notes
Check the installation space, water and coolant connections, and 115 V supply before fitting. Have a qualified installer connect the unit, fill and purge the water circuit before energizing it, and set and test the mixing valve before use.
View Isotemp SPA construction and specifications
Parts Desk Insight
Engine coolant can heat stored water above a comfortable tap temperature. The mixing valve needs correct cold-water plumbing and commissioning; tank temperature alone does not establish safe outlet temperature.
- Brand: Isotherm
- Manufacturer part #: 6P4023SPA0003
- Sold as: EA
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.