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PostPosted: Tue Apr 11, 2017 10:31 pm 
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Hi all.

What is the best way to test new radiator pipes for leaks without connecting the radiator itself?

I have laid some new pipes in our bathroom for a towel rad but cannot yet fit the towel rad until the wall is plasterboarded / plastered etc. Naturally as these are compression fittings i really need to check it all for leaks before putting plasterboard up to avoid any later disasters.

I am assuming fit a isolation valve to each pipe and then simply join them with a flexible pipe but not sure? (see attached pic)

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PostPosted: Wed Apr 12, 2017 12:19 pm 
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Two ways:

1. Test each branch separately:
a. Cap top outlet with compression or push fit stop end.
b. Pressurise lower end with test pump. I'd suggest 4 to 5 bar, leave for an hour.
c. Repeat for other branch

2. Test in one go:
a. Connect top outlets - plastic pipe probably easiest but use correct inserts. Use compression fittings or push fit. If compression, copper olives on plastic.
b. Stop end on one bottom outlet.
c. Pressurise other bottom outlet, again 4 to 5 bar for an hour. If using plastic to join, pump to pressure, leave for 30 minutes, then pump back to pressure and leave for further hour.

Try and use compression fittings compatible with those already in place, so you are testing everything possible.

If you really want to do it properly, remove all compression fittings from what will be inaccessible and replace with soldered. Test as before.

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