thru hull ?

[drknute3]

Installing an automatic ballast system on my boat and have a question about thru hulls below the waterline. I am going to install 2 1" thru hulls and then thread on a ball valve, then run hose to the pump. The problem I am having is matching the thread types between the thru hull and the ball valve. Most, if not all, thru hulls in 1" are straight thread. Most, if not all, ball valves are NPT. For low pressure systems like my ballast install and in fresh water only, what are my options? Does anyone make a ball valve with straight threads or a thru hull with NPT? A true seacock would be an obvious choice, but seems like overkill for my little wakeboard boat (23').

Ideas?

 

[dingbat]

Re: thru hull ?

I don't understand why someone would put a hole in the bottom of thier boat then not use all means to make sure a failure wouldn't put the vessel and its crew at risk.

Sure, you could rig something up but if something happens you, your crew and the little wakeboard boat all go to the bottom.

 

[dvan1901]

Re: thru hull ?

you should use parts that are meant for this application and not rig something up. If you use something other than what is correct, you run the risk of it breaking, or failing, and your boat sinking quickly. I would use real seacock valves and a use either 5200 or 4200 to seal it up.