Onoff Posted August 12, 2020 Share Posted August 12, 2020 I've one outside tap before the PRV and that pushes water through the hose at a ridiculous 8 - 9bar off the incoming mains. (I'm frequently splitting hose pipes and popping off cheap hose fittings. The reduced pressure mains (3bar) then runs up and over the top of the house to the kitchen. There's then a check valve, can't remember if it's single or double, and another outside tap. The pressure at this second outside tap is dire. Tbh the kitchen mains cold isn't that good. I know I need to clean the mesh filter in the PRV some time but can check valves "clog" over time? Cheers Link to comment Share on other sites More sharing options...
Nickfromwales Posted August 12, 2020 Share Posted August 12, 2020 Turn the PRedV up to 3.5 or 4 bar and enjoy the benefits. Yes, shite can block the fine gauze filter in the cartridge of the PRedV but that should all be worked out by now so a clean up should see you enjoy trouble-free motoring for a good number of years. 3 bar strangles the flow to death BTW, especially if fighting that ridiculous primary pressure. 1 Link to comment Share on other sites More sharing options...
Onoff Posted August 13, 2020 Author Share Posted August 13, 2020 6 hours ago, Nickfromwales said: Turn the PRedV up to 3.5 or 4 bar and enjoy the benefits. Yes, shite can block the fine gauze filter in the cartridge of the PRedV but that should all be worked out by now so a clean up should see you enjoy trouble-free motoring for a good number of years. 3 bar strangles the flow to death BTW, especially if fighting that ridiculous primary pressure. Ta. Can it really be 4 years since I did the water meter? ? I'll strip the PRV tonight and report. Dead easy tbh as I can isolate at the stopcock in the picture and there's then a 15mm ball valve on the mains up in the loft. I can drain to under the suspended floor. Only thing I recall from this is I should have put the PRV in horizontal according to the manufacturer's instructions.....which I just skimmed.....and missed that point. Link to comment Share on other sites More sharing options...
Mr Punter Posted August 13, 2020 Share Posted August 13, 2020 10 hours ago, Onoff said: I've one outside tap before the PRV Why did you have it before the PRV? It would have looked neater the other side and no pipes crossing and no hosepipe issues. Link to comment Share on other sites More sharing options...
redtop Posted August 13, 2020 Share Posted August 13, 2020 I am just re-doing this part of my plumbing. Had muck in the system which was causing predv to 'leak' water through and pressure kept increasing so have taken everything of following the stop cock to clean and re-do it a bit better. Anyhoo, looking at your setup I cant see the double check valve that should be fitted following the stop cock; I could be wrong though as trying to learn and am certainly no expert in plumbing! Link to comment Share on other sites More sharing options...
Onoff Posted August 13, 2020 Author Share Posted August 13, 2020 5 hours ago, Mr Punter said: Why did you have it before the PRV? It would have looked neater the other side and no pipes crossing and no hosepipe issues. Cos Nick said so! I can live with the pressure as long as I use decent hose and fittings. Tbh it's a boon having a big garden on a slope etc. 1 Link to comment Share on other sites More sharing options...
Onoff Posted August 13, 2020 Author Share Posted August 13, 2020 4 hours ago, redtop said: I am just re-doing this part of my plumbing. Had muck in the system which was causing predv to 'leak' water through and pressure kept increasing so have taken everything of following the stop cock to clean and re-do it a bit better. Anyhoo, looking at your setup I cant see the double check valve that should be fitted following the stop cock; I could be wrong though as trying to learn and am certainly no expert in plumbing! There's a check valve for the outside tap the other side of the wall in the picture. Single or double I couldn't say! The mains then travels across the house to the kitchen where there is a double check valve. That WAS once the only mains water tap in the house. However...reading your comment made be realise that the new bathroom's cold at the basin isn't "protected" by a check valve! Thanks for that, I'll get one. Link to comment Share on other sites More sharing options...
redtop Posted August 13, 2020 Share Posted August 13, 2020 1 hour ago, Onoff said: There's a check valve for the outside tap the other side of the wall in the picture. Single or double I couldn't say! The mains then travels across the house to the kitchen where there is a double check valve. That WAS once the only mains water tap in the house. However...reading your comment made be realise that the new bathroom's cold at the basin isn't "protected" by a check valve! Thanks for that, I'll get one. don't take my comments as anything related to best practice lol, plumber I aint! Link to comment Share on other sites More sharing options...
Onoff Posted August 13, 2020 Author Share Posted August 13, 2020 26 minutes ago, redtop said: don't take my comments as anything related to best practice lol, plumber I aint! All my plumbing is done standing on the shoulders of others on here...including you now! ? Link to comment Share on other sites More sharing options...
Mr Punter Posted August 13, 2020 Share Posted August 13, 2020 2 hours ago, Onoff said: Cos Nick said so! Then it is beyond reproach. 1 Link to comment Share on other sites More sharing options...
Nickfromwales Posted August 13, 2020 Share Posted August 13, 2020 7 hours ago, Mr Punter said: Why did you have it before the PRV? It would have looked neater the other side and no pipes crossing and no hosepipe issues. 'Cold mains priority' to the house if you do it that way Never have the O/S taps off after the PRedV as it hugely affects the available dynamic flow to the dwelling. 1 Link to comment Share on other sites More sharing options...
Onoff Posted August 13, 2020 Author Share Posted August 13, 2020 Can't find any of my 24mm spanners FFS! With a deep impact socket managed to get the first bit of the PRV off: Looking up inside: & with the endoscope cam: No mesh filter that I can see. Looks like a hex socket in there. Do I carry on with an Allen key to get the next bit out? Cheers Link to comment Share on other sites More sharing options...
Nickfromwales Posted August 13, 2020 Share Posted August 13, 2020 6 minutes ago, Onoff said: Do I carry on with an Allen key to get the next bit out? Cheers Yes, but if it all goes horribly wrong then, no....... Link to comment Share on other sites More sharing options...
Onoff Posted August 13, 2020 Author Share Posted August 13, 2020 (edited) The 4mm Allen key fits but it just goes around and around not coming out or screwing in? & I'm not sure if a) I can or b) I want to squeeze my ample frame in here to get a close up look! Edited August 13, 2020 by Onoff Link to comment Share on other sites More sharing options...
Onoff Posted August 13, 2020 Author Share Posted August 13, 2020 Well it just pulls out. A few tiny, weeney bits of grit in there. A rinse off and try and get it back in now. Wish I was slimmer! 1 Link to comment Share on other sites More sharing options...
Onoff Posted August 13, 2020 Author Share Posted August 13, 2020 Had to take the bloody loo seat off to get in there and screw it back! 1 1 Link to comment Share on other sites More sharing options...
ProDave Posted August 13, 2020 Share Posted August 13, 2020 Watching this with interest. Early in the build I ran a branch from the feed to the static caravan, via a stop valve, to an outside tap at the far side of the garden in case we want a vegetable plot over there. All piped in burried 25mm mdpe. First winter I forgot to turn the stop valve off and drain it. Never mind, mdpe is resiliant to freezing. Tried to draw some water from it that winter and all I got was a drip drip drip from the tap. Oh it's still frozen underground I thought. Bur even now, all I get is a slow drip drip drip. One day I will investigate where the blockage is. Link to comment Share on other sites More sharing options...
Onoff Posted August 13, 2020 Author Share Posted August 13, 2020 Oddly enough I think those little bits of grit might have been the issue. The PRV seems to adjust OK now. Might put a gauge on the furthest outside tap and see what I've got but it's certainly "better". Link to comment Share on other sites More sharing options...
Nickfromwales Posted August 13, 2020 Share Posted August 13, 2020 10 minutes ago, Onoff said: Oddly enough I think those little bits of grit might have been the issue. The PRV seems to adjust OK now. Might put a gauge on the furthest outside tap and see what I've got but it's certainly "better". What's it set to now? Link to comment Share on other sites More sharing options...
Onoff Posted August 13, 2020 Author Share Posted August 13, 2020 18 minutes ago, Nickfromwales said: What's it set to now? 4bar Link to comment Share on other sites More sharing options...
Nickfromwales Posted August 13, 2020 Share Posted August 13, 2020 9 minutes ago, Onoff said: 4bar Better? Link to comment Share on other sites More sharing options...
Onoff Posted August 13, 2020 Author Share Posted August 13, 2020 1 minute ago, Nickfromwales said: Better? Yes but I still want to put the gauge on it. Link to comment Share on other sites More sharing options...
Nickfromwales Posted August 13, 2020 Share Posted August 13, 2020 31 minutes ago, Onoff said: Yes but I still want to put the gauge on it. If it works, just walk away, OK Link to comment Share on other sites More sharing options...
Onoff Posted August 13, 2020 Author Share Posted August 13, 2020 (edited) This is my prv: Monument gauge didn't move when I screwed it on the outside tap and turned it on. Seized I guess? Will try tomorrow on the pre PRV outside tap. Mind you I just unscrewed it from my still as yet unconnected bathroom towel rail loop and it had slight rust stains on the connection. Presume from the iron fitting. This was taken Feb 2016 when I tested the UFH loop. Doesn't appear I used the gauge again until Feb 2018 when I tested the towel rail loop and not since: I'm just guessing these gauges can stick/corrode inside? Edited August 14, 2020 by Onoff Link to comment Share on other sites More sharing options...
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