1 1/2" Ball valve/ true union ?

[mr. pluto]

i just bought this for my dart. it's a combo unit.
i don't get it, it comes completly apart so you cannot have
any water pressure at all when you take off the union.
i was under the impression that you would close the valve
& unscrew the union & service the pump. is there more than 1
style avallible?

 

[corndogg]

the trick is that you only disconnect one side. You keep the side with the valce connected to keep the flow blocked.

 

[mr. pluto]

whats up with this thing?
look

ahhhh!!! ripped off at the drive thru again.

 

[corndogg]

that looks like a single union ball valve. I use the union ball valves found here. http://www.savko.com/partlist.asp?pgid=1

They turn very easy and are simple to make small adjustments. See how the true union ball valve has a joint on both sides of the handle. Single union bv's are fine just put the valve on the side you want to be able to close off.

 

[mr. pluto]

something is missing , you cannot hook it up to a
pump & remove it later for cleaning because the middle piece has no retainer to hold back water pressure. i know what it was supposed to do.

 

[corndogg]

how about a pic of it assembled

 

[Scuba Dog]

I always made my own ball valve/union combo..cheaper that way. I would have a valve on both sides of the pump...suction and discharge. have the union fitting facing the pump, that way when you break the seal youl only have minimal drainage.

 

[scottfarcuz]

I bought the same thing in 2" a few weeks ago for my dart. I thought I was getting a deal also until I went to take my pump off.

I went and bought a 2" plug to put in the bulkhead when I have to take the pump off next time.

 

[corndogg]

<a href=showthread.php?s=&postid=9669035#post9669035 target=_blank>Originally posted</a> by Scuba Dog
I always made my own ball valve/union combo..cheaper that way.

I have done this too. The only disadvantage is that they take up more space than a integrated union ballvalve. Plus the nicer ones are alot easier to turn and make smaller adjustments

 

[mr. pluto]

i think i'm gonna junk it & use a regular ball valve + true union
bulkier but painless.