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Grundfos isolation flanges (11 Posts)
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Grundfos isolation flanges
Any feedback, good or bad? These are the no-handle, screwdriver operated ones, where the flange piece slips over the back of the valve. The screwdriver operation appeals to me more than having a handle that you wind up having to remove.
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Old Stock
If you came across the screwdriver slot flange sets, they are old stock.
Once Webstone and many others introduced isolation flanges kits, some with checks, the ones from Grundfos introduced back in the '80's became obsolete. They were 3X the price and contractors preferred handles.
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Yep, kinda figured
If I prefer the slot type, any reason not to stock up on them? Being old stock, they're not 3x the price any more...
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N/A
August 31, 2010
@ 9:58 AM
I prefer handles,
as HDE points-out, but if you can get slotted/allen key type they are OK.
PS- Use the allen key because over time they will get very hard to turn with the slot. ;-)
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exercise is good
With this type of flange set, its always good to exercise (open and close) a few times when you're out doing your annual servicing. This will keep them loose so they won't freeze in the open position.16
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Ok, handles it is. :-)
Aesthetic concerns do not trump long-term performance.
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But what about homeowners like me...
While perhaps I can be trusted to know what the handles are for, and that almost all of them should be full on, how would you prevent an ignorant homeowner from turning them, perhaps in a dangerous way?
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That's easy...
Just remove the homeowner's hands.
Or the handles on the valves, if you must...
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they all seize up
after time. I've twisted the stem off the handle type also. Generally it's not the valve but the quality of the system fluid, that causes them to seize up.
A little system cleaner, then a hydronic conditioner helps a bunch. Better for all control valves, zone valves, and pump bearings, etc.
hr
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don't go there
The shafts will get sticky/seized and the slots will chew out. Go with handles.
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Go wit the handles
With time the slots and allen hex get stripped out and they become inoperable.
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