How to Install a Boiling Water Tap Tank Replacement

Quick answer

Replacing the 2.4 litre boiling water tank for your Buster+Punch 4-in-1 Kitchen Mixer Tap is a straightforward DIY task if you follow the correct shutdown and reconnection steps. This guide walks you through each stage with safety checks and common mistakes to watch for.

Installation steps

1. Disconnect power and water supply: Unplug the tank from the mains and turn off the cold water isolation valve under the sink. Open the tap to release pressure and drain any remaining water from the system. Skipping the power disconnect risks electric shock; always unplug first.
2. Remove the old tank: Disconnect the flexible hoses from the tank inlet and outlet. Note which hose connects to the cold supply and which goes to the tap. Loosen any mounting bracket and lift the old tank out. Label the hoses with tape before removal to avoid mixing them up during reconnection.
3. Install the new 2.4 litre tank: Place the new tank in position and secure it with the mounting bracket. Reconnect the hoses to the correct ports: cold supply to the inlet, tap line to the outlet. Hand-tighten then give a quarter turn with a wrench. Overtightening can crack the plastic fittings; use gentle pressure.
4. Restore water and check for leaks: Slowly open the cold water isolation valve. Listen for hissing and check all connections for drips. If you see a leak, tighten the fitting slightly. Wait 2 minutes and recheck. A slow drip may not appear immediately; wait and check again after the tank fills.
5. Power on and test: Plug the tank back into the mains and switch on. Allow 10–15 minutes for the water to reach boiling temperature. Open the tap briefly to confirm hot water flows and the tank refills correctly. The tank may emit a gurgling sound on first use as air purges; this is normal and should stop within a minute.

What you need

• KITCHEN TAP / REPLACEMENT BOILING WATER TANK / 2.4 LITRE: The 2.4 litre replacement boiling water tank is built to work with the Buster+Punch 4-in-1 Kitchen Mixer Tap, providing a reliable source of hot water directly from the tap. It is a direct replacement, so you can swap it without changing your tap or plumbing setup.