JFC trough leaking or pipe blow out of joint!

DJ98

Recently set up a jfc trough at first it kept leaking, fixed theat using plumbers tape, grand for a week, more tape and grand but now the pipe is just blowing out of the joint and i cant fix it, any ideas?


The water pressure is very low so thats not the problem.

patsy_mccabe

If it's a long pipe then the pressure might be low when the water is flowing but could build up to a high pressure when the ballcock stops flowing.

my3cents

Sorry for the stupid question but what makes a JFC trough any different from a plumbing point of view to any other trough? Do JFC have their own special fittings?

Keepgrowing

DJ98 wrote: »

Recently set up a jfc trough at first it kept leaking, fixed theat using plumbers tape, grand for a week, more tape and grand but now the pipe is just blowing out of the joint and i cant fix it, any ideas?


The water pressure is very low so thats not the problem.

Threads phucked on plastic elbow or valve thread.

patsy_mccabe

Standard ballcock has 1/2" parallel (BSPP). Joint has tapered 1/2" thread (BSPT). That's why those ballcock leak so much.

Who2

Would it be as simple a problem as a missing o ring on the joint( presuming it's plastic ) or I've seen a few where I've actually wondered how they could get such a twist on the grip part.

my3cents

If the pipe is blowing out of the joint then it has to be a compression fitting. Commonest would be Philmac and if you have the wrong "insert" for the fitting then it will blow out time and time again. In my experience the inserts that come with the fittings are the wrong ones 9 times out of 10 but the right inserts aren't much more than a euro each and simple enough to change.

By insert I mean the compression ring or adapter that fits inside the fitting but goes over the pipe, the older Philmac fittings using an insert that goes in the pipe. Another thing is if the pipe is chewed up its almost impossible to make a good joint.

I use a lot of half inch heavy duty pipe and the Philmac fittings never come with the inserts for that very common pipe size you have to get the correct inserts.

DJ98

my3cents wrote: »

If the pipe is blowing out of the joint then it has to be a compression fitting. Commonest would be Philmac and if you have the wrong "insert" for the fitting then it will blow out time and time again. In my experience the inserts that come with the fittings are the wrong ones 9 times out of 10 but the right inserts aren't much more than a euro each and simple enough to change.

By insert I mean the compression ring or adapter that fits inside the fitting but goes over the pipe, the older Philmac fittings using an insert that goes in the pipe. Another thing is if the pipe is chewed up its almost impossible to make a good joint.

I use a lot of half inch heavy duty pipe and the Philmac fittings never come with the inserts for that very common pipe size you have to get the correct inserts.

The rubber ring or the red part in the joiner?https://www.google.ie/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&ved=0ahUKEwib7uPbxZ_RAhUBPBoKHdZoBa8QjRwIBw&url=http%3A%2F%2Fwww.irrigationstore.com.au%2FRural-Poly-Joiners-Couplings&psig=AFQjCNEoe0KP2C1opWCZdXgSYKb1-PFxFg&ust=1483311928905151

my3cents

Whenever I buy Philmac fittings for half inch heavy duty pipe I have to buy one of these adapters the 999002 as the fittings come with metric inserts which sort of fit but but not correctly as I suspect you might have discovered.

Edit> iirc the inserts the fittings come with that you have to throw out are red?