Prevent Pump Hose From Clogging


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Yep.
I have a Fernco coupling at the transition between my pump flex PVC (1-1/2") and the ridgid PVC in my bog.
It has been there for 2 years and has never leaked.
I did buy a union to replace it, but never got around to changing it.

View attachment 151481

Wow. Never would have guessed that would work. I have some ferncos to hook up still and was planning to transition to rigid PVC first. Maybe I’ll skip that step.

I'd be a little concerned that switching from 1" down to 1/2" would only result in the same clogging problem.
Same concern.
 
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I'm not sure how that significantly differs from reducing the last 30cm of pipe from 1" to ½". Are you thinking that the biofilm might stick in that last 30cm? If so, it wouldn't be a huge problem. Reaming out that last 30cm would be child's play compared to what I have to do now.
 
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I don't know if this question was asked....
Where is your pump?
If it's sitting on the bottom of the pond, maybe it's picking up debris or algae and that's causing the clogging.
Tie a rope to it, keeping it suspended about a foot off the bottom.
 
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Putting a ball valve somewhere on the output side of the pump.

It differs in that you can have variable flow control, which is what I thought you were concerned about with increasing pipe size to 1". But like I mentioned earlier, I don't think that's going to be a problem.
 
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I don't know if this question was asked....
Where is your pump?
If it's sitting on the bottom of the pond, maybe it's picking up debris or algae and that's causing the clogging.
Tie a rope to it, keeping it suspended about a foot off the bottom.

The pond isn't very deep where the pump is; about 30cm (a foot). The pump is held off the bottom by sitting on a brick. I check the pond intake every time I ream the hose, which is about every other day now. I never find anything in the intake. The pond has no visible algae and I never feel any biofilm in the pump intake, although I'm sure that it's there.

After all the discussion here I'm convinced that the clogging is caused by biofilm which grows incredibly quickly inside the hose.

The fervent hope is that a larger diameter hose, while not preventing biofilm growth, will not get clogged by that growth, at least as not as often as it does now.
 
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I finally found a 1” hose barb. This at a giant hardware store in a beach town (Cha Am) where I have a condo and which is about 420K from my home. It was a last ditch effort that paid off. 25 baht for a pack of 5. That’s about 15 US cents each. The PVC flex has been delivered to my house. I’ll try and get everything put together when I get back there late next week.
 
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The hose has arrived.

2022-06-15_17.20.38.jpg


2022-06-15_17.26.56.jpg

The pump barbed fitting, the hose barb adapter and the hose clamps all fit. The hose barb was a struggle. It said 1" but I had to heat the hose the get it on far enough for the hose clamp.

Weather permitting I'll set it up in the pond today.
 
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Another question: When attaching the 1" hose to the pump, should I remove the ½" (5/8"?) barb from the pump fitting, or just leave it on?

2022-05-27_07.07.03.jpg
 
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2022-06-16 08.25.27.jpg

It was a real chore getting the flex PVC through the old PVC tunnel through which the AC line and hose feed. It was pretty easy with the 5/8" hose. Eventually I will need to find a different route for the power cord.

2022-06-16 08.31.51.jpg

I need to figure out how to hide the hose where it enters the pond. It's very stiff. Perhaps I can tie it to a brick or other heavy weight. (A couple of 2 kilo dive weights might do it.) As is, it sticks out like a sore thumb. (Night Blooming lily on the right.)

2022-06-16 08.32.06.jpg

I haven't figure out the fountain yet. So, I've just coiled the excess hose until I do.

The volume of water is more than expected, even without removing the 5/8" barb on the pump fitting. It just barely avoids overwhelming the stream.

The flex PC is way too big for the bamboo. I may reduce it into a 30cm length of ½" PVC which will fit through the bamboo and reduce the water flow to a more reasonable rate..

I will leave everything as is for a week and see if the biofilm problem has been mitigated.
 
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Can you bury the blue flex with soil or plants?
That's why I prefer black flex. It's less noticeable.

Can't wait for the results. I'm hoping the clogging issue has been resolved.

I have found a similar clogging problem with a couple of spitter statues I added.
I used 5/16" hose and fittings.
I tapped into a 1-1/2" PVC pipe with a brass 5/16" hose barb which has 1/4" threads.

After a few days the spitters slow down to almost nil. I turn off the pump for a few seconds in which I hear gurgling from the spitters, then turn it back on and the flow returns. I guess the gurgling backflowing water temporarily clears the clog.

So, the clogging is definitely due to the restriction of the small inner diameter.
It must be clogging at the fittings because I used clear vinyl hose and it looks perfectly clear.
I guess I have to use hose and fittings with a larger I.D.
 
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Can you bury the blue flex with soil or plants?
That's why I prefer black flex. It's less noticeable.

I didn't have a lot of choices. I couldn't find any PVC Flex locally of any color. I could have ordered black from Amazon for a lot more money. The blue I got from RS Components. It was still expensive, but less than Amazon wanted for the hose, shipping and customs deposit. I can hide the blue flex above ground, but the stretch where it enters the pond will always be an eyesore. If it solves the clogging problem, it will have been worth it.

If it doesn't solve the clogging problem I'll go back to the 5/8" garden hose which is easier to hide and otherwise easier to deal with.

The next few days should tell the story.
 
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I removed the pump hose adapter for the first time ever this morning in order to cut off the 5/8" barb. I was surprised to see how much sludge/biofilm/gunk buildup there was inside of the adapter. I've never cleaned this part, so what is there is what has built up over the past half year or so. The ID of what you see here is 1 ¼". I suppose that doesn't bode well for me new 1" hose.

2022-06-17_08.40.25.jpg
2022-06-17_08.40.40.jpg
 

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