What size through hulls/ seacocks/ hose fittings?

[KevinV]

While I have the boat out of the water I want to put through hulls in for fitting a sea water inlet for a tap, and waste water outlet for a sink - things I want to put in at a later date. I'm thinking DZR, partly for cost, but mostly because trudesign seacocks (which would have been my preference) are a bit big and clumsy for the space I have available.

What sizes do I need to fit? Stupid question I'm sure, but I'm getting completely baffled by all the inches and various bits of inches advertised!

 

[Tranona]

1/2" ball valve and either 13mm or 15mm tail depending on which hose you are using for water (depends on the tap). Probably the same again for the sink although some sink waste outlets are 19mm (3/4" ball valve) so you will need to match that.

 

[LittleSister]

I would definitely go for 3/4" for outlet. If you end up with a smaller e.g. 1/2", sink outlet it will be no problem connecting that to a wider seacock, but go the other way - e.g. reducing from 3/4" to 1/2" in an outlet may well result in blockages.

I in agree with Tranona 1/2" adequate for inlet.

 

[KevinV]

Brilliant, thank you both - simple answers

 

[ean_p]

While I have the boat out of the water I want to put through hulls in for fitting a sea water inlet for a tap, and waste water outlet for a sink - things I want to put in at a later date. I'm thinking DZR, partly for cost, but mostly because trudesign seacocks (which would have been my preference) are a bit big and clumsy for the space I have available.

What sizes do I need to fit? Stupid question I'm sure, but I'm getting completely baffled by all the inches and various bits of inches advertised!

try and keep the intake point on the opposite side of the keel to the discharge / toilet outlet if fitted....!

 

[KevinV]

try and keep the intake point on the opposite side of the keel to the discharge / toilet outlet if fitted....!

Good point that I had taken into account. Certainly well upwind - not sure I have space to route it from the other side though. No toilet fitted (just a portapotti), though it's worth considering where pipes might go if I changed that.

 

[vyv_cox]

try and keep the intake point on the opposite side of the keel to the discharge / toilet outlet if fitted....!

It's a good point, although impractical in some cases. On my Sadler the two are no more than 40 cm apart. The discharge is forward of the intake, making the situation when anchored in tidal waters even worse!