I've decided to fit the regal top hat I bought a while ago but need to get a part made/bought to fit the dump valve at the same time as otherwise there will be a hole in the tophat!
The lower threaded hole is as per the standard tophat, the one above it is the extra one for the dump valve to connect to. (Vice versa would make more sense as the outside of the connection is ridged to take a samco nicely, but im sure the thread sizes mean the bottom one is the same as std.)
Any ideas of a standard part from somewhere which I can use to connect to a short length of samco or do Regal actually do a proper part?
Thats exactly what I would have thought Miles, but when i looked at it a while ago the normal dv pipe is much larger, also the sensor which normally goes in around there is the same size as that thread (from memory) which means it is the upper one I have to use for the DV.
This is all from memory and the car is under wraps currently and tbh I can't be bothered to take them off to look. Somebody must know