How to power your HOTTAP

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Learn how to supply power to your HOTTAP, which batteries to use, what to do when your batteries go flat, and other power FAQs.

Click here to learn how to power your Joolca pump.

Power requirements

HOTTAP runs on two D-cell batteries. The batteries supply power to the ignition and LED monitor, and will last 3-6 months (depending on use). 

One D-cell battery supplies between 1.5V (standard) to 1.6V (heavy duty), so the two D-cell batteries supply 3.0-3.2V to the HOTTAP.

Your HOTTAP comes with a set of batteries included in the box. 

How to install the batteries

  1. Push on the battery box to release the compartment.
  2. Insert 2x D Cell batteries as per the diagram.
  3. Re-insert the compartment, push until it clicks into place.


What happens when the batteries go flat

Once the combined voltage of the D-cell batteries drops below 2.1V (e.g., after using the HOTTAP for 6 months) then your HOTTAP will not ignite. 


  • Your HOTTAP will not turn on at all, or
  • Your LED monitor will turn on, but you will not get any ignition.

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To avoid getting stuck without hot water, keep a spare set of D-cell batteries with your HOTTAP.

Which D-cell batteries should I use

You can use both standard (1.5V) and heavy duty (1.6V) D-cell batteries with your HOTTAP. As D-cell batteries are a universal (physical) size, you can use any brand.

What to do when storing the HOTTAP

When storing the HOTTAP for long periods of time, remove the batteries from the battery box. This will avoid the batteries discharging.

Powering the HOTTAP with the 12V Power Adapter

Aside from the batteries, you can also power the HOTTAP with the 12V HOTTAP Power Adapter. 

This will allow you to connect the HOTTAP to an electrical outlet or the Power Bank.


How do I install the HOTTAP 12V Power Adapter?

You can find the Installation Guide here.

How do I power the HOTTAP 12V Adapter?

You can read about it here.

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