Dear Experts,
I thought I ought to "do it properly" and test my new CH pipework before I hide it forever under a floor. Speedy Hire didn't have the manual pressure pump I wanted but let me have an electric one for the same price (this one: https://cdn2.ridgid.com/resources/m...&languageCode=en&countryCode=GB&type=document ). I connected it up to the first of my new pipes, filled with water and then closed the temporary valve at the far end. The pressure was pretty much immediately up to 6 bar so I closed the valve on the pump and left it for an hour.
An hour later there were no visible leaks and the pressure gauge on the pump had not noticably moved (it goes up to 60 bar, so a small drop would be hard to see). Good so far, but I had also connected another pressure gauge that only reads up to 11 bar, and on this one I could see that the pressure had dropped from 6 to 5.8.
Same results with second new pipe.
I can think of various harmless reasons for this, including temperature changes, expansion (including a couple of temporary push-fit fittings at either end), or tiny leaks from the pump attachment fittings. Should I worry about a small pressure drop when there are no visible leaks?
Thanks, Phil.
I thought I ought to "do it properly" and test my new CH pipework before I hide it forever under a floor. Speedy Hire didn't have the manual pressure pump I wanted but let me have an electric one for the same price (this one: https://cdn2.ridgid.com/resources/m...&languageCode=en&countryCode=GB&type=document ). I connected it up to the first of my new pipes, filled with water and then closed the temporary valve at the far end. The pressure was pretty much immediately up to 6 bar so I closed the valve on the pump and left it for an hour.
An hour later there were no visible leaks and the pressure gauge on the pump had not noticably moved (it goes up to 60 bar, so a small drop would be hard to see). Good so far, but I had also connected another pressure gauge that only reads up to 11 bar, and on this one I could see that the pressure had dropped from 6 to 5.8.
Same results with second new pipe.
I can think of various harmless reasons for this, including temperature changes, expansion (including a couple of temporary push-fit fittings at either end), or tiny leaks from the pump attachment fittings. Should I worry about a small pressure drop when there are no visible leaks?
Thanks, Phil.