Not necessarily. presumably the pump feeds both so some pipework is obviously already in place! Which is closest to the pump?
Tony Glazier said:
Motorised valve to fit 90mm OD pipe
- Thread starter Hooo
- Start date
Not necessarily. presumably the pump feeds both so some pipework is obviously already in place! Which is closest to the pump?
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black BAND not black steel 
refers to ther gauge as i said
black iron is the term
refers to ther gauge as i said
black iron is the term
black BAND not black steel
refers to ther gauge as i said
black iron is the term
True and red band would be bigger
still class as 80mm though.Sponsored Links
its 3" Dave but heavy
as close to 90mm OD as your going to get?
as close to 90mm OD as your going to get?
But I still wonder where the garden tank located any why an overflow cannot feed it 200 m away from somewhere!
I still dont know what country this is in!
Tony
its in africa Tony
concentrate on smelling the flowers
concentrate on smelling the flowers
black BAND not black steel
refers to ther gauge as i said
Yes, I know.
It's plausible that only heavy grade pipe would have been available as galvanized, which is what should have been used. If so, that would explain the gauge of the pipe and tells us that the OP shouldn't be welding it.
I doubt that black steel pipe would have lasted more than a few years if used with well water. If it is back pipe, he'd know from the rust in the water and should be planning on getting some MDPE to replace it.
The pipe does appear to be galvanised - it's not rusting anyway. I didn't realise you couldn't weld it. Why not? Can't you just grind off the plating? That's going to be a real pain, as the only other option is to get a threaded section to fit the existing joint, and who knows what thread pitch they've used?
I only measured it roughly with a tape. It's about 90mm OD and 80mm bore, and the thread pitch is about 2.25mm. But, is there any guarantee it's a British type anyway?
It's in Zambia, to be more specific, but can't see why it matters It's too far to pop in and have a look.....
The pump is at the bottom of the property, the pipe runs underground all the way to the water tower, about 600m. About 400m along this pipe there is a T underground (I assume) as a pipe rises out of the ground and fills the garden tank. This spur pipe has a valve in it so that when you open it the garden tank fills, and there is not enough pressure for the water to reach the tower. When you close the valve all the water goes to the tower. If I was to fit a small valve in the spur pipe, there would propbably be too much pressure in the pipe even with the valve open, and the tower would still get filled.
It's way too much work to fit a float valve to the tower, there's no inlet pipe to attach it to, as the inlet just ends at a hole in the tank wall - it's all welded and galvanised.
It's also way too much work, and bloody ugly, to run a pipe 200m from the tower to the garden tank!
I only measured it roughly with a tape. It's about 90mm OD and 80mm bore, and the thread pitch is about 2.25mm. But, is there any guarantee it's a British type anyway?
It's in Zambia, to be more specific, but can't see why it matters
It's too far to pop in and have a look.....The pump is at the bottom of the property, the pipe runs underground all the way to the water tower, about 600m. About 400m along this pipe there is a T underground (I assume) as a pipe rises out of the ground and fills the garden tank. This spur pipe has a valve in it so that when you open it the garden tank fills, and there is not enough pressure for the water to reach the tower. When you close the valve all the water goes to the tower. If I was to fit a small valve in the spur pipe, there would propbably be too much pressure in the pipe even with the valve open, and the tower would still get filled.
It's way too much work to fit a float valve to the tower, there's no inlet pipe to attach it to, as the inlet just ends at a hole in the tank wall - it's all welded and galvanised.
It's also way too much work, and bloody ugly, to run a pipe 200m from the tower to the garden tank!
It's in Zambia, to be more specific, but can't see why it matters
Not that far as I am expecting to visit SA and Zim ( depending on the outcome of the runoff ) during August.
Tony
Galv as I remember gives of cyanide when welding it, which isnt too healthy
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