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Discuss Have I hired a cowboy? in the USA area at PlumbersForums.net
Looks like it is holding for a minute ( just a tiny puddle under in the past 2 hours, although the heating isn't on so not under pressure. The issue is where the leak is. Right on the internal bend so hard to clip, or do anything to!Piece of rubber and a jubilee clip ?
I didn't know I could until today lol. Good old YouTube!If I knew you could drain the system and dry out the leaking joint somewhat I would've suggested you use some JB Weld epoxy. Make a small saturated fabric wrap with it and wrap the joint but ideally you have to leave it for 24hrs to cure and ideally has to be dry with no back pressure from any water.
For a start that's the lockshield valve, so you should probably be looking at changing the other one (the wheelhead valve)*. Secondly, you're measuring it wrong. Inside that big nut will be a hexagonal recess for a kind of large Allen key designed for removing radiator valve tails. The type of connexion your radiator has is now less common, so you'll need to wind out the whole valve tail which will screw into the radiator. The radiator itself finishes flush. You probably won't see the joint, because the tail has been painted over heavily.In the meantime I thought I would swap out an old valve on an old radiator for a thermostatic one, but it looks like I have ancient ones and they are way smaller than any I can find online. Any suggestions as to what I can do/where I can find small ones?
Sorry, I know I put the wrong end in the pic. It was just easier ro show measurement on that end as I had just drained that rad from that end, and both sides are same valve length.For a start that's the lockshield valve, so you should probably be looking at changing the other one (the wheelhead valve)*. Secondly, you're measuring it wrong. Inside that big nut will be a hexagonal recess for a kind of large Allen key designed for removing radiator valve tails. The type of connexion your radiator has is now less common, so you'll need to wind out the whole valve tail which will screw into the radiator. The radiator itself finishes flush. You probably won't see the joint, because the tail has been painted over heavily.
Concerned you may be slightly out of your depth, but I suppose if you want to learn, it's not a bad place to start. Worst case scenario is you have to blank off the radiator pipe for a while and remain one radiator down - so if you aren't competent with fitting a compression stopend correctly first, buy a number of copper olives and a couple of compression stopends in 15mm size (will also work on 1/2") then you can practice on a scrap bit of pipe connected to a hose.
*I say probably because most TRVs can be fitted to either the flow or return of the radiator - some are directional, so you need to check the arrow on the body and make sure you fit it so it points in the direction of water flow which might mean you HAVE to fit it where the current lockshield valve is. Usually the lockshield valve will be on the return - the cooler end of the radiator.
I could cry
This is how every plumber learns. (Not the tape and leak sealer bit, the bit where you do your best and really think you've got it sorted and it goes and leaks somewhere else)So, system drained. Pipe cleaned and sanded. Jenolite applied. Left to cure for a day and system refilled and sentinel leak sealer added. Heating and water put back on this evening. New leak spotted (other end of the same fixing) and quickly plugged with Jenolite and wrapped in Amalgamating tape. Old leak still active and back to its old tricks. I could cry
I was convinced it had worked as was all bone dry for a while, then it found a pathway and boom!!!It is seriously surprising how hard it is to hold back water even at a low pressure.
How do I get the jenolite off now though? It is set rock solid and wrapped around the pipe!Sorry to hear that, can be hit or miss with these resins. Start over, do as you did with your prep making sure it's clean and dry. JB Weld will do it now you know where your leaks are. Make an impregnated wrap with the epoxy and wrap the fitting, stipple it with a brush or use gloves to apply. I 've used this a few times with no failures as long as it can dry cure.
Edit: fair enough but it still might be a while before you can get your system replaced but sound like you have other leaks too.
Hi Chuck
Yep. Pinhole leak on the inside bend of one of the connections. Plumber 3 cut a large length of new pipe and replaced it. No leaks now thankfully. We are getting the whole system replaced in the New Year as this is the second leak in pipes buried under the concrete floor, and I am not going through all this again lolWhat was the cause of the original leak? If pin-holed copper pipe, then likely to be much more widespread than just the point at which the leak occurred.
Thanks for the heads up. Had been thinking of keeping the upstairs ones in place as no issues there but maybe not the best idea then.If you get a new system make sure NO pipes are reused. There was some very poor quality copper pipe around 30-40 years ago.
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