Sink plumbing ?

[TQA]

My rather nice screw together metal plumbing under my sinks literally crumbled in my hands when I went to unscrew them this afternoon. They came with the boat and I guess were some sort of home DIY product.

Anyway I need some 90 degree bends T pieces and sink connections. All inch and a half.

Is it OK to use regular home style plastic components and glue the lot together? Other than the three sink connections. The riser from the seacock is flexible hose and terminates well above the waterline.

Is there anything to watch out for.

 

[duncan99210]

You may find that they are caravan sink fittings, simple single piece cup with a barb fitting for the hose, secured to the underside of the sink by a screw through the centre of the plug hole. Caravan websites have them or ebay. Otherwise, I've used B&Q domestic fittings as a stop gap until I could get the caravan stuff.

 

[nigelmercier]

You may find that they are caravan sink fittings...

Mine appear to be just that, but the OP says his are 1½", I've not seen this size on a caravan type.

I'd love to increase the ID of mine from ¾", even with the same through-hull and sea-cock they should drain faster.

 

[David2452]

My rather nice screw together metal plumbing under my sinks literally crumbled in my hands when I went to unscrew them this afternoon. They came with the boat and I guess were some sort of home DIY product.

Anyway I need some 90 degree bends T pieces and sink connections. All inch and a half.

Is it OK to use regular home style plastic components and glue the lot together? Other than the three sink connections. The riser from the seacock is flexible hose and terminates well above the waterline.

Is there anything to watch out for.

Plastic fittings will be fine, but rather than the solvent weld fittings you suggest I normally use the compression type with rubber seals, better at coping with any vibration and movement. Take care when selecting the components as waste pipe and fittings are 32mm & 40mm OD not 1 1/2" bore, that will not be an issue with the sink drain as the BSP connectors are available but some ingenuity may be required to interface with the 1 1/2" flexi hose. A good interface from 40mm poly is a 1 1/2" hose joiner, if you heat the poly with a good heat gun you can force it over the hose joiner which leaves a nice connection for the hose, I often have to use that method with shower rooms on larger boats where most of the plumbing is poly to 1 1/2" sanitation hose.

 

[charles_reed]

My 25 year-old plastic sink plumbing has centre-fixed L to the sink-outlet - I can confirm the internal bore IS NOT 1.5", but 1.48" (od 40mm) so would advise against using any internal plastic plumbing fittings.
I've dismantled it a couple of times and re-fitted using plumbing centre O-rings to seal the compression rings.

 

[prv]

A good interface from 40mm poly is a 1 1/2" hose joiner, if you heat the poly with a good heat gun you can force it over the hose joiner which leaves a nice connection for the hose

Heh - a good trick, I'll have to remember that :encouragement:

Worth noting that the OP is in the Carribean, where I would guess that the plumbing parts available are probably to US standards and different to ours.

Pete

 

[Minchsailor]

I would be wary of using caravan type components if they are likely to be below the waterline. Replace the lot with reinforced PVC hose and doubled jubilee clips.

 

[TQA]

Heh - a good trick, I'll have to remember that :encouragement:

Worth noting that the OP is in the Carribean, where I would guess that the plumbing parts available are probably to US standards and different to ours.

Pete

Yup it is a US built boat and I think the bits that crumbled were part of a major refit carried out in the USA by the previous owner so it should all be imperial. Once I link the three sinks together they will connect to a piece of 1 1/2 ID hose.

Off to Ace Hardware in sunny Grenada tomorrow to see if they have the bits I need, wish me luck.