05-02-2013, 04:08 PM
(This post was last modified: 05-02-2013, 04:11 PM by Radio Fixer.)
I see no problem Lawrence. There would be the normal feed and expansion tank and it would be just like shutting off one of the valves, in a two valve setup. Used to keep the rad one shut all the time in the summer.
Yes! Nick's heat pump is impressive, neat installation. But as said you need the land (No! not enough) and the number of years (No! not enough) to pay back the high cost of installation.
On changing parts, or stopping leaks I know of two ways and my knowledge is only with non pressurised systems. I used the frozen plug method (gusset of insulation and freezer aerosol) a few times but you need good access to a length of pipe and around motorised valves and thats not normally the case. The other way that came along later, and I havent tried, are two purpose made rubber bungs. One is screwed in the expansion pipe and the other into the outlet from the header tank. I'm told that as air cant get in then the water doesnt come out !! So I was told you can change a rad for example.
But I guess most plumbers are just going to shut off the rads, tie up the ball valve and drain. They dont care if the anti corrosion liquid is lost, most customers wont know they ever had it and probably didnt unless they knew about it and asked.
Gary
Yes! Nick's heat pump is impressive, neat installation. But as said you need the land (No! not enough) and the number of years (No! not enough) to pay back the high cost of installation.
On changing parts, or stopping leaks I know of two ways and my knowledge is only with non pressurised systems. I used the frozen plug method (gusset of insulation and freezer aerosol) a few times but you need good access to a length of pipe and around motorised valves and thats not normally the case. The other way that came along later, and I havent tried, are two purpose made rubber bungs. One is screwed in the expansion pipe and the other into the outlet from the header tank. I'm told that as air cant get in then the water doesnt come out !! So I was told you can change a rad for example.
But I guess most plumbers are just going to shut off the rads, tie up the ball valve and drain. They dont care if the anti corrosion liquid is lost, most customers wont know they ever had it and probably didnt unless they knew about it and asked.
Gary
