grundfos

These seem to no longer be available (unless anyone can let me know from where I could get one) so... Could anyone help with how to use 2 independent pumps (one for DHW and other for CH) and eliminate the need for any motorised valves. Surely someone must have worked out suitable circuits, both...

I have just had a new heat only boiler installed. I believe it is a 2 pipe system with 3 port valve for ch and dhw. The installer couldn't really tell me what setting the pump should be on. I have had it on III since the install but the manual I downloaded suggests pf2. Can anyone help with...

My newly fitted ups2 pump has developed an intermittent fault so need to get it replaced. The alpha2 i can get for £10 more then the ups2, is it worth getting seeing as it offers better efficiency and should save me a few quid on energy usage? Any negatives to moving to the alpha2?

i have a faulty ups2 15-50/60 going back and wondering if i can replace with an alpha2 which is gonna cost roughly £10 more. I am thinking even though alpha2 may be overpowered for my size of house, it will save money by being more efficient? house is 4 bed with approx 15 rads and the ups2 was...

My Grundfos pump keeps making these rattling/bubbling noises in 2 minute cycles. 2 mins of noise, 30 secs of perfect silence, then 2 mins of noise again. It runs at 16w initially and then drops to 15w steady thereafter on setting 2. Is it pushing sediments/air through the system and it takes...

I have just had a Worcester 18Ri boiler fitted to replace my old boiler. I also had the pump changed to a Grundfos UPS2. The system is a Y type with a HIVE controller and has TRV's on all the radiators. It has a manual bypass across one of the radiators upstairs. Would it be best to set the...

Are there still some startup problems with these circulators? Most of the comments are now a few years old, though the sensitivity to spikey voltage was mentioned only a couple of months ago. I would also like to ask if these problems occurred when on a proportional pressure speed setting or...

Can't seem to find a thread regarding UPS2 pump which aren't lasting, I was sure someone started a thread regarding these, I replaced an old 15-50 on a gravity hot/pumped heating 2 weeks ago and the UPS2 has failed, but know idea why. Any ideas. Cheers

Hey, To cut a long story short I decided as a single mother that I would google and work out how to get air build up out of my heating system rather than spend a fortune on a plumber this side of Christmas! BIG MISTAKE!!! I live in Ireland so I have a kerosene boiler situated outside. I read...

4 floor terraced house with 15 rads - only a 15-60. That's crazy, right? They go through pumps every 2 years so I've recommended a bigger pump. What's the best way to size up pumps in relation to number of rads / floors / size of house.

Hello everyone! I've had a scan through the first 2 pages of 'Grundfos pump faults' but can't find anything similar to the problem I have. I would like to know of possible causes of pump failure. There is power going to the pump, it was fitted in the correct orientation and it was working fine...

hi, my c/h pump has stopped working, i have a replacement and have purchased 2 new gate valves as the existing are corroding. This pump is on a gravity feed system, this pump looks to pump hot water to the taps and also to the raidators would this be correct?. i need to drain the system to...

Has any one fitted one . Are they any good . Customer wants a mega flow . But just not enough pressure with in coming mains

Would appreciate your thoughts on this....... Should the Grundfos UPS2 that has recently been installed to my system be run using one of the proportional pressure modes? The old Grundfos pump didn't have this has an option and ran on setting 3.

Hi anyone up to speed on pump sizing. a job I'm pricing has been specified with two pumps. One for heating ( twin head) the spec is0.803kg/s 82kpa. .??? one for secondary circuit. ( single head) 0.050kg/s 20kpa. I have no idea what those figures mean. They were meant to be specifying the...

anyone know the expected ohms resistance on a grundfos 15/60 pump? I renewed a pcb on a glowworm ultimate as the board wasn't sending any voltage to the pump...had to go back today as same problem has returned! Am thinking there ay be a problem with the pump causing summat to blow on board tar

Hi all,I have a central heating system with a pump that's started making a loud vibration noise every so often,the pump speed was on 2 and iv turned it up to 3 .in doing that the pump still makes the noise from time to time ,but the heating is alot warmer.I'm thinking I will need to change the...

Hi We have moved last year to an older house which has 25 rads and there is a Grundfos 15/60 pump in CH system. Basically not all radiators get hot when system running, there are two honeywell controllers and if downstairs is off then upstairs gets hot and vice versa, however when full system...

Morning folks just wondering if I could get an opinion Fitted a new central heating pump for a customer about five weeks ago. Didn't think system water looked too bad. Got a call back about three weeks ago saying that the new pump had failed, capacitor was really struggling to get the...

I have an air source heat which worked fine through last winter. I have recently reconnected it after finishing other building work. When I started it up i found that the pump was not working and had seized up. I opened it up and found some rust or caking inside the chamber which I chipped off...