Installing the overflow piping

The tank was drilled and bulkheads installed with the intention of using Marley piping from B&Q ....... mistake #1! It is very difficult to get anything other than bog standard fittings for the Marley pipe, and I had ordered some 40mm ball valves for the primary overflow ...... needless to say the Marley piping didn't fit the ball valve :(

To solve the problem i turned down the outer diameter of the marley piping and the inside diameter of the ball valve, this lead to a perfect fit, they have been solvent welded together and the join looks as safe as houses.





The left overflow is the primary overflow, eggcrate protects the inlet :) the right overflow is the standby/backup, the 90 degrees knuckle bend is just to keep things neat :)

The middle hole will house the return pipe from the sump, and has been fitted with a reducer so the pump line can be soft piped