Grainfather getting clogged on false bottom

[dweb]

This has happened a few times.At 1st I thought it was to do with the way the grains were getting crushed but it`s happened twice,once from geterbrewed and once from HBC.I mash in as normal and all seems good until I start the mash and turn the pump on.The recirculated wort fills up and goes down the overflow,so I then have to reduce the flow through the pump.
When the mash is complete and I lift the basket up to drain and start sparging,the wort takes a long time to filter through,so I have to work the spent grain with the spoon,which then discolours the wort.
Has anyone else had this problem?
I`ve done about 10 brews with the Gf and 8 have been perfect and 2 have had this problem?

 

[Granarian]

I have similar problems recirculating, but not in the sparge. I've stirred the grains about five minutes before the end of the mash which helps. The mash water ratio means the porridge is really thick. I tried closing the valve, but I had to reduce it to a trickle, so settled for the overflow! I'm only getting just over 70% efficiency.

 

[Batlugs]

I've had this problem from time to time, seems to happen when the grain has a fair bit of flour in it. I've found that a real good stir after doughing in can help, if not stop the pump halfway through the mash and give it another stir, this helps and gives it chance to filter clear again.

What volume of strike water to grain are you using? I use about 16l to 5kg of grain, seems to work great and I get efficiency in the 80's and sometimes 90's.

email David Bawden at the manufacturers, you can do it from the website, he knows all there is to know about the GF and is very willing to help.

Cheers

 

[dweb]

I use between 15-18 litres for 5kg grain bill.
I`ll give that David guy a shout and get his opinion.
Cheers guys.

 

[dweb]

Just happened again!
I think it`s to do with the crushing of the grains.
I`ll try another supplier.