Best fix for PVC pipe under pressure

[westcoast]

After more than a couple of years renovating I'm ready to start on the landscaping. First job - build retaining wall...first lesson. Shovels and storm water pipes don't mix. The damaged pipe has a 150 mm split along its length and is part of a wet system that will eventually be connected to the rainwater tanks. I'm looking for a fix that is permenant, is ok for use under pressure and doesn't involve digging up large quantities of pipe.

On the recommendation of a friend I bought an expansion coupling but it doesn't look like it will enjoy the pressure to me. I figure this must happen a lot and there must be a tried and tested method of repair.

Thanks

[Farmer Geoff]

Probably a few options to fix it. But first, what size is the pipe and how much pressure?

[westcoast]

Thanks. It's 100mm sewer pipe. I'm not too sure about the pressure but it is connected to 6 down pipes to deliver water to rainwater tanks, the top of which is about 3 m above the damaged bit. Hope that makes sence

[plum]

Just cut the damaged section out and use 2 plumqiks to join a new piece in.

[westcoast]

Thanks. Excuse my ignorance but what is a plumqik?

[Farmer Geoff]

3m head is no drama to deal with. The expansion joiner you already have may do the trick or, if pipe is fairly well aligned then use slip joiners with PVC glue to connect a new bit to replace the removed damaged section. Mark the pipe first to ensure the joiners are centrally located over the joins. Ask your plumbing shop.

Plum's suggestion of plumbqwiks is a bit more expensive but easy and effective. see Plumbqwiks | Fernco Pty Ltd (http://www.fernco.com.au/products/fernco-plumbqwik-couplings/plumbqwiks)

Whatever method you use, don't fill hole til you test it. Wait 24 hrs then run hose in gutter while keeping fingers crossed. Good luck.

[plum]

A bit expensive? Two plumquicks at 10 bucks each.....

[wonderplumb]

Plumbquicks or two-piece repair couplings then incase them in concrete to ensure they don't move. If you want it done properly, dig up enough pipe to get the flexibility required to be able to glue two fixed points.

[westcoast]

Thanks for the quick responses