Eliminate the need to drain a system down

Upgrade your plumbing kit with the Ultimate Bung Set + DripStopper — the all-in-one solution to change radiator valves, service boilers or work on heating/pipes without draining the system — and now with extra drip-protection built in.

What You Get — Total System Control

• 15 mm & 22 mm silicone bungs — universal fit for most UK tank and system feed/vent sizes. 

• DripStopper — extra back up bung + water-retention safety for radiator, valve or tank work. 

• Hand-tightening, no-tools clamp/wing-nut system — easy, quick to set up and remove.

• Compact carry pouch or storage bag — keeps everything organised in your van or toolbox.

Why It’s a Must-Have for Engineers, Plumbers & DIYers

• No drain-down required — isolate feed tanks and vents fast so you can change radiator valves or work on pipework without emptying the system. 

• Extra drip control with DripStopper — reduces mess, water loss, and risk of sludge or debris contamination while working — especially crucial on older systems.

• Fitted to 15 mm & 22 mm systems — covers the majority of domestic UK plumbing and heating setups. 

• Durable and reusable — hard-silicone bungs grip better and last longer than traditional rubber bungs. 

• Save time, avoid disruption — perfect for radiator valve swaps, motorised valve servicing, small plumbing fixes or emergency call-outs — all with minimal fuss.

What It’s Ideal For

• TRV (thermostatic radiator valve) swaps

• Radiator valve or lockshield changes

• Motorised valve maintenance or replacement

• Boiler or system servicing without full drain-down

• Emergency call-outs where time, cleanliness & system integrity matter

• Jobs where you want to avoid sludge flow or full system water loss

Quick Instructions — Get Sealed & Go

1. Tie up the ballcock in the feed/expansion tank.

2. Insert the correct size bung (15 mm or 22 mm) into the tank feed/vent and tighten by hand.

3. Use the DripStopper to seal off the radiator/pipework — ensuring no drips or leaks.

4. Do your valve-change or plumbing work.

5. Remove bungs, refill or repressurise system if needed. Clean-up minimal, water saved.

Why Heatlab Tools Are Different

With over 20,000+ customers trusting Heatlab, we build plumbing tools around real-world plumbing jobs — tools designed by engineers who use them every day. The Ultimate Bung Set + DripStopper isn’t just another kit — it’s a time-saving, mess-reducing, system-protecting upgrade for any heating or plumbing pro.