installing a pump?

[p-Jay]

im planning on getting a danner mag 3, however i've read reviews about cracking the pump when screwing 1/2" barbs on them. what kind of barbs do i need for a 1/2" ID system? and would i need to seal it with silicone or something to prevent it from leaking? would i just need this male adapter http://www.cooltechnica.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=MPAE&Category_Code=H ?

 

[zer0signal667]

Using nylon (or some other plastic) barbs would probably prevent crackin the housing. I have also heard that it's a good idea to silicone the housing seal where the O-ring sits right off the bat, because they often leak. My friend had one of these pumps and suffered both problems- he first used a brass barb and it leaked, then the O-ring leaked.

 

[OneMadPoptart]

Screwing in ANY barb too much will make the housing crack.

 

[weapon--]

Originally posted by OneMadPoptart
Screwing in ANY barb too much will make the housing crack.

true - but a male brass npt going into plastic female threads makes that h311a easy to do. it usually doesn't even feel like you are exerting much pressure and then you hear CRACK!

in my experience with the danners, the plastic on the impeller housing is rather brittle. I'd stick with nylon fittings on that one unless you have some experience with using brass on plastic.