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Just a few things I can spot and type out quickly as I'm on a mobile device right now...
The combination valve should be installed near or above the top of the cylinder so it doesn't need to be drained down to repair/service.
The D1 discharge pipe from the T & P valve must not exceed 600mm in length and that one exceeds that distance.
There must be a continuous vertical section of the D2 discharge pipe of at least 300mm before the first bend after the tundish. They certainly haven't done that unless maybe the pipe out of the tundish goes straight down through the ceiling. The pipe should run vertically (at least have a fall) before the tundish but this one has a long horizontal run instead.
The external expansion vessel must be mounted in a vertical orientation to prevent stagnation and silt trapping.Sadly yours is on its side on the floor.
I'm sorry OP but that's not installed correctly at all.
The combination valve should be installed near or above the top of the cylinder so it doesn't need to be drained down to repair/service.
The D1 discharge pipe from the T & P valve must not exceed 600mm in length and that one exceeds that distance.
There must be a continuous vertical section of the D2 discharge pipe of at least 300mm before the first bend after the tundish. They certainly haven't done that unless maybe the pipe out of the tundish goes straight down through the ceiling. The pipe should run vertically (at least have a fall) before the tundish but this one has a long horizontal run instead.
The external expansion vessel must be mounted in a vertical orientation to prevent stagnation and silt trapping.Sadly yours is on its side on the floor.
I'm sorry OP but that's not installed correctly at all.
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