Replace a Push-Fit Fitting — Trade Method
Replacing a push-fit fitting is a 30–60 minute job with the right kit and confidence to isolate the water. This is the exact sequence UK plumbers use — including the pressure-test step DIY guides usually skip.
Step-by-step method
1. Cut the pipe square with a rotary cutter
Cut the pipe square with a rotary cutter. Deburr inside and out.
2. Mark the insertion depth on the pipe (22mm for 15mm, 24mm for 22mm)
Mark the insertion depth on the pipe (22mm for 15mm, 24mm for 22mm).
3. For plastic pipe, insert the pipe stiffener fully
For plastic pipe, insert the pipe stiffener fully.
4. Push the pipe in one firm motion until it hits the stop
Push the pipe in one firm motion until it hits the stop.
5. Turn on water and check — a genuine JG Speedfit joint should not weep
Turn on water and check — a genuine JG Speedfit joint should not weep.
Frequently asked questions
Do I need a plumber to replace a push-fit fitting?+
Not legally — push-fit fitting replacement is not notifiable. But if you cannot confidently isolate the water, get a quote (typically £70–£140).
What size push-fit fitting do I need?+
UK domestic standard is 15mm compression tails. Check your existing fitting first — some older builds use 22mm or imperial 1/2" BSP.
Is the new part guaranteed?+
Reputable brands (Reliance, Pegler, JG Speedfit) offer 5–25 year guarantees on their fittings when installed to instructions.