Grunfos pump

More
6 years 9 months ago #533653 by tonybaker
Replied by tonybaker on topic Grunfos pump
trust me! the wrath of a partner when you don't have water is not a thing to be experienced lightly!! Buy a cheap replacement pump from TM whilst you fiddle with your pump. It's always good to have a spare pump anyway. Plan B is take the pump to the agent and bring home their loan pump. Talk to your partner about it and respect their decision.

5 acres, Ferguson 35X and implements, Hanmay pto shredder, BMW Z3, Countax ride on mower, chooks, Dorper and Wiltshire sheep. Bosky wood burning central heating stove and radiators. Retro caravan. Growing our own food and preserving it. Small vineyard, crap wine. :)

Please Log in or Create an account to join the conversation.

More
6 years 9 months ago - 6 years 9 months ago #533655 by Rokker
Replied by Rokker on topic Grunfos pump

Aquila wrote: Incorrect pressure WILL cause cycling of the pump, Used to install and service waterpumps for a living and saw it all the time. The pump ruins, Builds up pressure and then turns off.

. . . and then STAYS off until either a leak or intentional water draw-off causes the pressure to fall. That is not cycling. The pump is not going to restart until the pressure drops below the switch cut-in threshold.

Do NOT cross this paddock! ... Unless you can do it in 9 seconds, 'cos the bull can do it in 10!
Last edit: 6 years 9 months ago by Rokker.

Please Log in or Create an account to join the conversation.

More
6 years 9 months ago #533656 by Aquila
Replied by Aquila on topic Grunfos pump
Guess I can't argue with stupid.

Please Log in or Create an account to join the conversation.

More
6 years 9 months ago #533657 by Rokker
Replied by Rokker on topic Grunfos pump

Aquila wrote: Guess I can't argue with stupid.

Please do! At least explain what turns the pump on again after it's built up enough pressure to turn off.

Do NOT cross this paddock! ... Unless you can do it in 9 seconds, 'cos the bull can do it in 10!

Please Log in or Create an account to join the conversation.

More
6 years 9 months ago #533658 by Aquila
Replied by Aquila on topic Grunfos pump
In 3.5 years of servicing water pumps, you service the tank properly and they stop cycling. Call it magic if you want.

Please Log in or Create an account to join the conversation.

More
6 years 9 months ago #533659 by Rokker
Replied by Rokker on topic Grunfos pump
In some cases of short cycling, yes. But highly unlikely in Smokendark's case. But I guess we'll just have to agree to disagree on that. :)

Do NOT cross this paddock! ... Unless you can do it in 9 seconds, 'cos the bull can do it in 10!

Please Log in or Create an account to join the conversation.

More
6 years 9 months ago #533660 by LongRidge
Replied by LongRidge on topic Grunfos pump
As a matter of interest, why use a pressure tank pump when there are "almost impossible to fail" Pedrollo pumps available?

Please Log in or Create an account to join the conversation.

More
6 years 9 months ago - 6 years 9 months ago #533661 by tonybaker
Replied by tonybaker on topic Grunfos pump
yep, why use yesterdays technology instead of the modern electronic controllers? When you have to replace the bladder you will pay as much as for a new pump!

5 acres, Ferguson 35X and implements, Hanmay pto shredder, BMW Z3, Countax ride on mower, chooks, Dorper and Wiltshire sheep. Bosky wood burning central heating stove and radiators. Retro caravan. Growing our own food and preserving it. Small vineyard, crap wine. :)
Last edit: 6 years 9 months ago by tonybaker.

Please Log in or Create an account to join the conversation.

More
6 years 9 months ago #533662 by Rokker
Replied by Rokker on topic Grunfos pump
Quite true, Tony. Some time ago I had to replace the bladder on an early Davies pump and found the bladders were no longer available, so had to replace the whole tank for over $90 !!

Actually, reading back through this thread, it seems we've all assumed that Smokendark's pump is a pressure tank type. He's never actually confirmed that point!

Do NOT cross this paddock! ... Unless you can do it in 9 seconds, 'cos the bull can do it in 10!

Please Log in or Create an account to join the conversation.

More
6 years 9 months ago #533664 by Aquila
Replied by Aquila on topic Grunfos pump
Having a pressure tank means the pump runs less often for longer rather than running every time you open a tap for just a second which is a good way to burn out a pump.

Pedrollo pumps fail, especially if you don't use a pressure tank as the switch contacts burn out more quickly.
The following user(s) said Thank You: LongRidge

Please Log in or Create an account to join the conversation.

More
6 years 9 months ago #533667 by Rokker
Replied by Rokker on topic Grunfos pump
The agents tell me that the latest Pedrollo models have completely solid state controllers - no mechanical switch contacts to burn out. It's probably still worthwhile adding a pressure tank though, for the reason Aquila mentioned - extending pump life.

Do NOT cross this paddock! ... Unless you can do it in 9 seconds, 'cos the bull can do it in 10!

Please Log in or Create an account to join the conversation.

More
6 years 9 months ago #533668 by Aquila
Replied by Aquila on topic Grunfos pump
So no user servicable parts. When it dies you'll be up for a new pump everytime

Please Log in or Create an account to join the conversation.

More
6 years 9 months ago #533670 by Rokker
Replied by Rokker on topic Grunfos pump
I'm afraid so, Aquila. Welcome to the age of disposable commodities and throw away modules.

Back in the day a technician would repair your TV by coming to your house, methodically diagnosing the problem, isolating the fault and replacing the dead component - sometimes just a 10 cent resistor! Then came the day when they employed "technicians" who had no idea on how modern tv circuitry worked, so all they did was come and replace an entire module - for which you paid, of course!

And can you remember the days when you could open the bonnet of your car and see all the parts that made it work - starter motor, alternator, fuel pump, coil and distributor, etc etc - and you could change or reset the contact breakers and set the timing - all for a few bucks. Now it's all computer controlled and when the engine light comes on you need to take it to someone with a diagnostic analyser who'll decide it's a faulty oxygen sensor, so you replace it and the next day the light comes on again and back you go for another analysis, only to be told it's a different sensor. So you fork out for another one, and after this process repeats itself a couple more times the techo tells you that the whole computer is on its way out - and that will cost you a thousand buck or more!

And this, of course, is progress! :dry:

Do NOT cross this paddock! ... Unless you can do it in 9 seconds, 'cos the bull can do it in 10!

Please Log in or Create an account to join the conversation.

More
6 years 9 months ago #533673 by Aquila
Replied by Aquila on topic Grunfos pump
Yes I used to be a water pump serviceman and irrigation installer, now working in a mechanics workshop.

Please Log in or Create an account to join the conversation.

More
6 years 9 months ago #533682 by Hawkspur
Replied by Hawkspur on topic Grunfos pump
...and the other side of the good old days was the need for all those servicing visits.
The bottom fell out of the mechanical workshop businesses when reliable cars arrived from Japan, that didn't need to be in for a service before every long trip to increase the chance they'd make it there. A friend had to completely change their business model for servicing cars because that changed it radically.
High quality control on parts makes some brands very reliable.

Please Log in or Create an account to join the conversation.

Time to create page: 0.172 seconds