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That sounds good. So on my 100mm wide bricks I can use 112mm DPC and leave the 10 - 12 mm spare DPC extending past the face. The existing house DPC doesn't protrude but as long as my bellcast bead doesn't bridge it i should be fine?

Thanks for the reply. I was working on the basis I needed some kind of gap between the DPC and the Base of the render in case some kind of bridging occurred. Is that not the case? If not then blocks straight onto the DPC would save me some time and bricks.

I am currently building a small side extension to my house under permitted development. I managed to lay the foundations and build up to DPC last year before the winter kicked in. I am back on the case now and have a few questions if anyone can help. The house is made out of imperial bricks...

Took the PRV apart. As i mentioned earlier the outside looked furred. You can see in the photo there is a crust around the internal lip. The dust to the right of the PRV is what falls off when i scrapped it with a small driver head. Stripped PRV So this is 9 years of build up clogged the...

Thanks, really enjoyed learning and diagnosing the faults. After a quick trip to the local bike shop for a bike pump and a few flex hoses (linked together for reach) I have recharged the EV, opening and closing the drain cock and rechecking the EV pressure. Noticed the Boiler gauge pressure...

understood, the PRV is an all or nothing safety device opening at 3 Bar, its the pressurised EV that takes the normal operating expansion pressure. Thanks I have run the system for a few hours now and noticed the pressure is still rising by 1 bar to 2 bar (from a 1 bar starting point). This...

Think i have come up with an idea (in my own way) why replacing a faulty PRV would fix my issue. The PRV and EV are all working in tandom. If the PRV is broken i.e. stuck then it isn't allowing any expansion at all, so the EV is having to take all the increased pressure. I presume the PRV...

Just got home with spare PRV. I drained the existing pressure out of the system by opening the existing PRV. I then attached a hose to the drain on the hall radiator, leaving the PRV open i drained the system. PRV replacement was a straight forward job. Detached the discharge pipe, loosened...

There is a drain on my hall radiator, if I attach a length of hose from this nipple to the outside drain and leave this open it should drain my CH system and release all pressure? While i am doing this i should be able to replace the prv with...

thanks for the reply. The diverter valve works when the i open a Hot water tap, the micro switch is activated by the small rod that pops out the front (return when tap is switched off and flow stops). Can i test the pressure of the expansion vessel with a small digital tire gauge? what...

1st post so thanks for reading. I have a 9 year old Baxi 80e driving a DHW and 6 radiator CH system. Recently I turned on the CH and noticed by chance the CH pressure gauge was at max 4Bar!!!! immediately I turned off the system and waited for the system to cool, pressure dropped. My...