"Had to alter the pipework on my central heating to accomodate a new towel rail and found the 10mm plastic behind the wall. I useda 10mm/15mm elbow to attach the copper and had to cut back the 10mm pipe. I tried using the superseal JG inserts but proved a nightmare getting them in, so went for these and they did the job perfect."
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Review 2 for John Guest Speedfit TSM10NP Insert 10mm Pack of 10