beachy
Active Member
- Location
- Caerphilly
Run it through a bed of reeds, no need for artificial filters, we use them to remove iron pytate in wales with greatt success.
Do any irrigation experts here know about filters?
- Thread starter slowmotion
- Start date
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OP
OP
slowmotion
Quite dreadful
- Location
- lost somewhere
I'm not trying to clean up the water like in a koi pond. The trout are quite happy with the trickle of surface run-off that exists at present. I just want to filter out the larger debris that might bung up the pipe.
classic33
Leg End Member
It'd also take out the larger stuff as well.
OP
OP
slowmotion
Quite dreadful
- Location
- lost somewhere
This isn't supposed to be a full blown water treatment facility! It's just a glorified hosepipe siphoning some water into a pond on a temporary basis. The only reason for going for a pipe which can deliver a reasonable volume in a short space of time is to keep the thing from getting blocked. It's not some kind of industrial-scale hydraulic larceny FFS! Do you townies get all sniffy about people filling up their paddling pools with expensively purified mains water?
classic33
Leg End Member
I've quoted what I've used laying pipes for similar reasons. The major differences being the pipe length and bore.
Used half inch pipes on runs upto a mile in length. Water for cattle half the time. Done when the cattle couldn't be moved and they had to be prevented from contaminating any water course.
OP
OP
slowmotion
Quite dreadful
- Location
- lost somewhere
@classic33, I apologise. I wasn't taking a poke at you. Some people here seem to want to turn this into some kind of major official undertaking. It's in the middle of nowhere, has zero environmental impact, and we do actually have a modicum of common sense. Is that enough these days? Probably not.
classic33
Leg End Member
Common sense might be asking too much.
Never taken as you having a go at me @slowmotion. Seconded the reeds because its an easy first filter, keeping the larger bits out.
Never taken as you having a go at me @slowmotion. Seconded the reeds because its an easy first filter, keeping the larger bits out.
OP
OP
slowmotion
Quite dreadful
- Location
- lost somewhere
Fair comment, and I apologise if I came over all arsey. I'm very grateful for all your replies. You have helped us enormously. Pace.
fatblokish
Guru
- Location
- In bath
Self-cleansing velocitiy is about 0.8 m/s. This is the velocity of water in the pipe required to prevent sediment build-up. Therefore, if you can achieve a velocity of 1.0 m/s the pipe should not block due to sediment deposits.
Therefore, you only need to prevent large solids from entering the pipe, so a mesh of a half-inch or so would be adequate, reducing the frequency of keeping the mesh itself clean.
To prime the pipe, I suggest that you forget the pump and instead put a bung in the downstream end and pour in a few buckets worth of water in the top end. You don't need to completely fill the pipe to prime it, instead only need to ensure the volume at the d/s end is greater than the volume of the top (uphill) section.
A shopping basket, lined with chicken wire, would work admirably as a filter. And as a previous poster has suggested, position the uphill end somewhere below the surface of the burn to avoid floating debris, yet above the bottom of the pond to avoid sinking debris. An inline valve at the bottom end of the pipe could be used to control the discharge rate and can be turned off whilst maintaining a pipe full of water (to avoid re-priming).
Therefore, you only need to prevent large solids from entering the pipe, so a mesh of a half-inch or so would be adequate, reducing the frequency of keeping the mesh itself clean.
To prime the pipe, I suggest that you forget the pump and instead put a bung in the downstream end and pour in a few buckets worth of water in the top end. You don't need to completely fill the pipe to prime it, instead only need to ensure the volume at the d/s end is greater than the volume of the top (uphill) section.
A shopping basket, lined with chicken wire, would work admirably as a filter. And as a previous poster has suggested, position the uphill end somewhere below the surface of the burn to avoid floating debris, yet above the bottom of the pond to avoid sinking debris. An inline valve at the bottom end of the pipe could be used to control the discharge rate and can be turned off whilst maintaining a pipe full of water (to avoid re-priming).
OP
OP
slowmotion
Quite dreadful
- Location
- lost somewhere
@fatblokish. Diamond dope! Many many, thanks.
A stray sunken supermarket trolley filled with scrunched-up chicken wire, and one of these has got me thinking. A three stage filter, a la Adrian.
A stray sunken supermarket trolley filled with scrunched-up chicken wire, and one of these has got me thinking. A three stage filter, a la Adrian.
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OP
OP
slowmotion
Quite dreadful
- Location
- lost somewhere
One year later.....
We stayed for a few days in the middle of absolutely nowhere in the Cevennes. The stone building was about 30 metres above a small stream. The owner had a small portable in-line 1kW high-head pump that irrigated his ancient vegetable terraces. It was good for about a 50 metre lift. It looked like a bit of kit that would probably cost £200. I think that the siphon idea is a bit daft really.
We stayed for a few days in the middle of absolutely nowhere in the Cevennes. The stone building was about 30 metres above a small stream. The owner had a small portable in-line 1kW high-head pump that irrigated his ancient vegetable terraces. It was good for about a 50 metre lift. It looked like a bit of kit that would probably cost £200. I think that the siphon idea is a bit daft really.
OP
OP
slowmotion
Quite dreadful
- Location
- lost somewhere
It seems my pal wants nothing less than the parting of the waters in The Red Sea.
classic33
Leg End Member
There's me thinking it was Scotland all along.
