I went to Lowe's tonight, and found a bunch of 2" - 1/2" MNPT PVC stuff.
You might be able to find what you need there.
Hope the threads on your housing are OK.

Inlet/outlet on Bioforce 500 are 1" MNPT(standard pipe threads in US)
So, for example:
A 1" MNPT coupler costs about 79 cents.(1" female to 1" female)
A 1" MNPT reducer costs even less. (1"male to 3/4" hosetail)
For another 3 bucks, you can buy adapters to hook a standard garden hose to
it.
You can water your flowers & change your water at the same time. :-)

Otherwise, just do a search. There are a lot of online sources, I think.
You could also contact HoZelock.
www.pondusa.com has a breakdown of parts for that model.

Doug
..


"Helge Nordtveit" wrote in message
...
Can anyone direct me to a source for the fittings on a bioforce 500
filter??
the threaded fitting that holds the nipples in place for the hoses in
particular.