Brass or bronze?

[charles_reed]

If it's the heads outlet I would also reccomend Forespar Marelon from ASAP.
I fitted one to my heads outlet.
No metals to eventually cause the valve to fail.

I'd 2nd - mine bought in Greece were cheaper that DZR and precisely 50% of the weight. Also offered SS.

 

[Len Ingalls]

My local US orientated supplier has ball valves described as ' marine brass' would this be DZR?

Also they have bronze ball valves for much the same prices.

Would you automatically choose bronze or is there reason to consider marine brass.

I didn't know DZR was available( marine suppliers) in N.A. yet.
Be cautious with brass in N.A. .Know what you are getting http://www.practicalmachinist.com/vb/general-archive/marine-brass-red-brass-88966/

 

[ghostlymoron]

Sitka 291i is a sealant and adhesive which will work fine but is more difficult to remove the fitting next time so better to use non adhesive sealant perhaps butyl tape.

I thought I would add that as I commented earlier , I fitted a Marelon seacock to my heads outlet.
However , I used a new DZR hull fitting and a DZR elbow either side of it and used Sika 291i to seal and adhese it all together.

As far as I can tell this works fine.

One issue I noted was that getting the retataining nut tight on the tail piece was very difficult in the tiny spaces you have to work in on boats.

I made a note to try and give it a final go at getting it tight enough the following day (it was not not loose it's just that you want to be sure) , however the 291i had cured and the whole assembly was absolutely secure.

Can't think as I write if 291i is a sealant or a sealant AND adhesive but it is reccomended for the job , as well as others of course.