I am currently renovating a house which is running a vented back boiler system for the central heating and hot water. This is being removed and I want to have an oil Combi installed (professional install) but I want to do the pipe work with in the house my self.
There is already an oil tank installed so would purely be the pipe work and the boiler install it’s self.
Flow rate has been checked and is acceptable to run a Combi.
The plumbing system will consist of; 3 radiators down stairs and 3 upstairs (possibly 4). A hot and cold feed to the shower and bathroom sink, hot and cold feed to the kitchen sink and a cold water supply to the dish washer.
I’ve done basic plumbing before but never a full new install and I was just after some guidance on what I’m planning on doing mostly regarding the central heating system.
The boiler is going to be installed on the ground floor from there I want to run the flow and return in 22mm from the boiler directly into the ceiling. For the radiators upstairs from the 22mm I will run each rad individually on 15mm from a manifold.
For the radiators down stairs I want to T off of the upstairs 22mm run with another two pieces of 22mm which will go into the ground floor suspended floor and feed the 3 radiators down stairs in the same way individually from a manifold. The reason for going up and then down is due to the fact half the house is on flag stones and the other half is a suspended floor and the boiler will have to be installed on the side of the house with the flag stone floor. There is not really any way of running the pipe work from the boiler to the suspended floor with out crossing door ways or digging up the flagstones. If I do it this way it will mean I won’t have to run pieces of 15mm to each rad from upstairs saving on multiple pipe drops and making a nicer install.
For the hot and cold water I’m simply going to run the mains cold feed into the boiler in 15mm which will t off to the cold gaps and up stairs then the hot out will be on a T feeding upstairs and down stairs.
Will this system work and is it possible or will it cause me issues? Or is there a better way? and am I missing anything?
I know an expansion vessel will be required but the boiler I am planning on purchasing has one built in. All radiators will have TRVs and there will be a pressure relief and drain off installed to outside.
Thanks!
There is already an oil tank installed so would purely be the pipe work and the boiler install it’s self.
Flow rate has been checked and is acceptable to run a Combi.
The plumbing system will consist of; 3 radiators down stairs and 3 upstairs (possibly 4). A hot and cold feed to the shower and bathroom sink, hot and cold feed to the kitchen sink and a cold water supply to the dish washer.
I’ve done basic plumbing before but never a full new install and I was just after some guidance on what I’m planning on doing mostly regarding the central heating system.
The boiler is going to be installed on the ground floor from there I want to run the flow and return in 22mm from the boiler directly into the ceiling. For the radiators upstairs from the 22mm I will run each rad individually on 15mm from a manifold.
For the radiators down stairs I want to T off of the upstairs 22mm run with another two pieces of 22mm which will go into the ground floor suspended floor and feed the 3 radiators down stairs in the same way individually from a manifold. The reason for going up and then down is due to the fact half the house is on flag stones and the other half is a suspended floor and the boiler will have to be installed on the side of the house with the flag stone floor. There is not really any way of running the pipe work from the boiler to the suspended floor with out crossing door ways or digging up the flagstones. If I do it this way it will mean I won’t have to run pieces of 15mm to each rad from upstairs saving on multiple pipe drops and making a nicer install.
For the hot and cold water I’m simply going to run the mains cold feed into the boiler in 15mm which will t off to the cold gaps and up stairs then the hot out will be on a T feeding upstairs and down stairs.
Will this system work and is it possible or will it cause me issues? Or is there a better way? and am I missing anything?
I know an expansion vessel will be required but the boiler I am planning on purchasing has one built in. All radiators will have TRVs and there will be a pressure relief and drain off installed to outside.
Thanks!
