Hi folks,
A few months ago we had a worcester bosch 28i junior boiler fitted which was replacing a back boiler system. The heating side was fitted to the old microbore pipework. I have noticed that the pipes to each rad which get hot first (I presume these are feed pipes) do not go to the trv side on all rads. The microbore is looking old and corroded in areas and I have fixed 4 leaks since the new system was put in. The pipes are also way longer than they need to be and dangle on the ground downstairs with no insulation under a ventilated suspended floor. Due to this and the fact that the pipes running upstairs are in a ventilated/cold chimney with no access to insulate them, I wish to replace/re-route all the pipework before we put down new carpets etc. Before I do this I thought I would ask some questions.
1) Would it be best to remain with 22mm feeds then microbore? the house is a small 2 bed semi with 6 rads. 4 downstairs and 2 upstairs (downstairs bathroom) or would a larger bore be better? perhaps plastic?
2) Should all feed pipes to each rad be on the trv side?
3) Does the system need a PRV on it to stop pressure build up? There was none fitted by the company who fitted the boiler. I plan on fitting a towel rail, if i do not have a trv on the towel rail, will this allow the water to constantly flow and thus no need for a PRV? or will this lead to the boiler being constantly on and inefficient?
4) Can I "T" piece the feed and return pipes near the boiler and send a feed and return upstairs to 2 port manifolds to do the 2 rads and also a feed and return going to 4 port manifolds for the downstairs 4 rads? At the moment the feed and return go to manifolds downstairs then continue out the manifolds and upstairs to the next manifolds.
Any answers you can give me would be excellent. I am sorry if this is unclear as I am pants at writing stuff. If you need more info please ask.
Many thanks in advance
Pippo
A few months ago we had a worcester bosch 28i junior boiler fitted which was replacing a back boiler system. The heating side was fitted to the old microbore pipework. I have noticed that the pipes to each rad which get hot first (I presume these are feed pipes) do not go to the trv side on all rads. The microbore is looking old and corroded in areas and I have fixed 4 leaks since the new system was put in. The pipes are also way longer than they need to be and dangle on the ground downstairs with no insulation under a ventilated suspended floor. Due to this and the fact that the pipes running upstairs are in a ventilated/cold chimney with no access to insulate them, I wish to replace/re-route all the pipework before we put down new carpets etc. Before I do this I thought I would ask some questions.
1) Would it be best to remain with 22mm feeds then microbore? the house is a small 2 bed semi with 6 rads. 4 downstairs and 2 upstairs (downstairs bathroom) or would a larger bore be better? perhaps plastic?
2) Should all feed pipes to each rad be on the trv side?
3) Does the system need a PRV on it to stop pressure build up? There was none fitted by the company who fitted the boiler. I plan on fitting a towel rail, if i do not have a trv on the towel rail, will this allow the water to constantly flow and thus no need for a PRV? or will this lead to the boiler being constantly on and inefficient?
4) Can I "T" piece the feed and return pipes near the boiler and send a feed and return upstairs to 2 port manifolds to do the 2 rads and also a feed and return going to 4 port manifolds for the downstairs 4 rads? At the moment the feed and return go to manifolds downstairs then continue out the manifolds and upstairs to the next manifolds.
Any answers you can give me would be excellent. I am sorry if this is unclear as I am pants at writing stuff. If you need more info please ask.
Many thanks in advance
Pippo