Replacement pump - does rotation direction matter

[hartnellg]

I am thinking of replacing my existing central heating pump with a Wilo Smart pump

The existing pump was fitted to the system in 1984 and rotates in an anti-clockwise direction. It is in a pipe that feeds into a junction where motorised valves for hot water, ground floor heating and first floor heating combine

The Wilo smart pump rotates in a clockwise direction.

I think this means that if I drop the Wilo pump into the system as is, it will push/pull the water in the opposite direction to the direction the current pump pushes / pulls the water

So the questions are;
1) are my assumptions correct ?
2) if the water is pushed/pulled in the opposite direction does that matter ?
3) is there likely to be any configuration on the pump to change the rotation direction ?
4) if there is no rotation configuration, and the water still needs to 'go the same way', can I get round it by fitting the Wilo pump back to front and upside down ?

Thanks for any advice

Geoff

 

[Gary59]

Thats an Upside down Question.....

 

[Gasguru]

Just look at the arrow on the pumps rear casing and fit it the same way as the old one.

 

[doitall]

1. No
2. yes it does matter which way it flows.
3. no all pump turn clockwise when viewed from the head
4. Pump needs to be the same way as the original see arrow on body, you can turn just the head if its upside down.
5. The shaft must be horizontal

 

[Agile]

Be aware that the Wilo pump is very reliable from an electrical aspect but the bearings are not as "hard" as the Grunfoss.

Whilst in most systems the Wilo would be OK, if the water is dirty with blackish water you will probably find the bearings will wear out in a quite short time.

Tony

 

[ChrisR]

I reckon - for what that's worth - that Grundfos are better electrically too, and run quieter. Consider a Grundfos Alpha.
Have certainly replaced some young Wilos which have gone electrically "open".
The older Wilo Salmson were possibly better.

 

[Agile]

My experience is the opposite Chris.

I change an electrically failed Grunfoss every couple of months, I even teach trainees the indicative smell.

With the Wilos, I cover hundreds but have only ever once found an electrical failure.

Bearing failure is another matter and I change perhaps 10 Wilos for each Grunfoss!

Tony

 

[ChrisR]

The Wilos in your Biasi's would be quite new - the electrically failed G's quite old I expect... The last "open and smelly" WGold I changed had the new type centre screw, I noticed.
I spose we all get funny looks sniffing pumps in old airing cupboards?

 

[doitall]

Whatever turns you on Chris

My Grundfos gold is 25 ish years old now and still stirring the sludge

 

[wilhelm]

I change an electrically failed Grunfoss every couple of months, I even teach trainees the indicative smell.

hey
i am
impressed

 

[itsonlyme]

Just had my massive big bertha pump replaced
after 33 years, don't expect the mini new one to last
any where near as long.

Mind you the old pump had been playing up since last Nov,
would just stop working but a whack with a hammer would
get it going for another month or week or day at the end.

Actually bought a rubber hammer for the wife to use,
was frightened she would crack the casing with the metal one !
Also put a 'X' on the casing so she knew where to hit it

Anyway, week last Monday at 10.30pm pump stopped,
so I whacked it a few times as the bug..er wouldn't start
Next minute hot water is ****ing from the pump, last thing I needed
at bed time, so out to garage for tools etc and a system drain down.

Finally got to bed at 11.30pm after turning the boiler off
and having the Knob crumble in my hand...

see my other post " 2 grand for new Knob"

Life is never boring
regards
IOM

 

[Soggy_weetabix]

do as tony and chrisR says.

Wilo is a poor pump, whilst grundfos are better engineered.

Remember though, a pump is only as good as the system its installed on

David

 

[wilhelm]

Wilo is a poor pump, whilst grundfos are better engineered.

i got one

they are ok