Not sure if this is the right place to post this, so sorry if it's not.
I've had a grundfos macerator in my bathrrom since just after I moved in (about 5 years.) It's never worked right, and it eventually went kaput last week. So I replaced it with a newer version - a Sololift WC. But I still have the same problem, which is that the pump sometimes works ok, but sometimes can't pump the water away for a long time, then it eventually gets over the blockge or whatever and clears.
The setup is as follows: from the macerator, there's a 90 degree connector coming out of the side and then going vertially upwards (supplied by grundfos). Then, to connect to the old system, I have another 90 degree bend with a reducer to 22mm copper pipe, which has a short (400mm) horizontal run before turning vertically and going up about 2.4m through the ceiling. In the loft, the pipe turns through 90 again to run horizontally (with a slight drop) for about 8m. Then it comes out of the wall, turns through 90 degrees again and drops vertically for one storey before joining the 32mm vertical pipie that drains the sink and bath which travel vertically into the main waste.
So, I think either the pipework's too long and narrow and the pump can't cope (although it ought to be able to) or I'm getting syphoning causing airlocks. Would a none return valve in the vertical copper pipe in the bathroom help? Or one of these to equalise the pressure http://www.plumbworld.co.uk/442-1788 Or maybe increasing the pipe bore to 32mm (in which case where do I get a fitting for that) after the vertical rise?
Any other ideas from someone who knows?
Cheers.
PS, When we first moved in there was a Saniflo and that was even worse. Died after about a month. The people who installed the bathroom in our house before us decided it would be a good idea to put it somewhere where there was no outside wall. They had the bath and sink going into it too, which meant that once we had raw sewage coming up through the bath. Nice. Luckily, there's an outside wall close enough to enable us to have rerouted the bath and sink under the floor. But it's too long a distance to get the correct fall for the toilet. I would avoid these things like the plague from now on, but unfortunately I don't have a choice, other than moving stuff about, and it's a bit late for that. I just want to get it to work properly so we can sell the house.
PPS sorry for the long post.
I've had a grundfos macerator in my bathrrom since just after I moved in (about 5 years.) It's never worked right, and it eventually went kaput last week. So I replaced it with a newer version - a Sololift WC. But I still have the same problem, which is that the pump sometimes works ok, but sometimes can't pump the water away for a long time, then it eventually gets over the blockge or whatever and clears.
The setup is as follows: from the macerator, there's a 90 degree connector coming out of the side and then going vertially upwards (supplied by grundfos). Then, to connect to the old system, I have another 90 degree bend with a reducer to 22mm copper pipe, which has a short (400mm) horizontal run before turning vertically and going up about 2.4m through the ceiling. In the loft, the pipe turns through 90 again to run horizontally (with a slight drop) for about 8m. Then it comes out of the wall, turns through 90 degrees again and drops vertically for one storey before joining the 32mm vertical pipie that drains the sink and bath which travel vertically into the main waste.
So, I think either the pipework's too long and narrow and the pump can't cope (although it ought to be able to) or I'm getting syphoning causing airlocks. Would a none return valve in the vertical copper pipe in the bathroom help? Or one of these to equalise the pressure http://www.plumbworld.co.uk/442-1788 Or maybe increasing the pipe bore to 32mm (in which case where do I get a fitting for that) after the vertical rise?
Any other ideas from someone who knows?
Cheers.
PS, When we first moved in there was a Saniflo and that was even worse. Died after about a month. The people who installed the bathroom in our house before us decided it would be a good idea to put it somewhere where there was no outside wall. They had the bath and sink going into it too, which meant that once we had raw sewage coming up through the bath. Nice. Luckily, there's an outside wall close enough to enable us to have rerouted the bath and sink under the floor. But it's too long a distance to get the correct fall for the toilet. I would avoid these things like the plague from now on, but unfortunately I don't have a choice, other than moving stuff about, and it's a bit late for that. I just want to get it to work properly so we can sell the house.
PPS sorry for the long post.