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PostPosted: Nov 10th, '11, 14:43 
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Gday has anyone had issues with pumps losing pressure?

when i started my flood and drain system up 8 weeks ago, the pump was filling up all 5 GBs ok. Yesterday i noticed only one bed was filling completely so i ran some mains pressure water through the lines to give them a flush out and adjusted the taps between GBs, which seemed to fix the problem. Until this afternoon when i notice none of the beds are now filling to the overflow level. As far as i can tell the pump has lost pressure, has anyone else had a similar problem or do i just need a bigger pump?

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PostPosted: Nov 10th, '11, 14:50 
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Is the intake of the pump clear? nothing on the impeller? I have seen a pump before that had the vanes of the impeller coming loose on the shaft. Everything looked fine, but when it was under pressure it would slip.

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PostPosted: Nov 10th, '11, 15:09 
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The intake (and output) are clear, and the last cycle flooded all beds for about a minute. Its currently set to 15/45 FD, im wondering if i should increase it to 30/30, or perhaps twist the standpipe a little to reduce the drain hole size? Or maybe im operating too close to the pumps limits and would be better off upgrading.

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PostPosted: Nov 10th, '11, 15:11 
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No harm in running 30/30...... :dontknow:

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PostPosted: Nov 10th, '11, 15:18 
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sweet ill give that a try, cheers

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PostPosted: Nov 10th, '11, 16:21 
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Bugger, same problem again, and visibly less pressure coming from the outlets. The impeller makes one full turn on the drive shaft then engages solidly. Im pretty sure it wouldnt have enough pressure to flood even running full time.

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PostPosted: Nov 10th, '11, 16:38 
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Is it one of our pumps or did you get it elsewhere?

If it is, bring it in and we'll replace the impeller or you a new one..

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PostPosted: Nov 10th, '11, 16:40 
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yep cheers

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PostPosted: Nov 10th, '11, 16:58 
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Had a good run with them, apart from a few that have had physical damage, from dropping them, I think we've only had 2 returns from about 300 that we have sold.. Because of that we are covering them with a 4 year warranty.

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PostPosted: Nov 11th, '11, 09:46 
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Thanx for that, this one looks to be moving more water. Ive got it on constant flood now until i can get back home later and check it all on timed settings.

cheers,
Gazza

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PostPosted: Jun 11th, '13, 09:58 
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Morning, I know this is an old thread, but it covers (very closely) the issues I have started experiencing in the past week or so with my BYAP 3k l/h pump.

I noticed the GB was not flooding over the standpipe with any gusto like it had been, and was getting progressively weaker.

As I had just dislodged a bit of algae from the side wall of the FT, I thought that may have been an issue, but when I checked the pump (took it apart and checked for blockages) it was lovely and clean; also there were no blockages in any of the plumbing. I hooked up the backup 2400l/h pump and the flow went back to what I was used to.

Is there anything else I can/should try (I will check for impeller slippage when I get home tonight)?

Cheers
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PostPosted: Jun 11th, '13, 10:06 
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Could be impeller slippage... Pull it out and see how it feels, if it's slipping we'll give you a new one.. If you still have no luck with it bring in the whole pump and we'll change it..

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PostPosted: Jun 11th, '13, 10:58 
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cool, thanks for that. I will be down on the weekend at least once :)


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PostPosted: Jun 11th, '13, 17:37 
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I find turning mine off for a couple of minutes and back on can result in a better flow, however in my system the 19mm outlet pipes do tend to clog up a bit and perhaps the back flushing effect helps clear them...

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PostPosted: Jun 11th, '13, 17:44 
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Its amazing how much flow you get if you upgrade your main supply pipes to the next size. When I purchased my last pump I was quite disapointed with the flow. After getting over my blonde moment, I discarded my old 20mm flexi supply with some 40mm PVC but still kept the 20mm distribution pipes. Then the flow was so fierce I had to cut my standpipes down because the water couldnt escape quick enough from the beds and the level lifted another 2 inches. I probably need more holes in my media guards too come to think of it.

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