Equipment & Supplies • my siphon won't pick up junk- need advice

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my siphon won't pick up junk- need advice

Postby jed clampett » Fri Nov 08, 2019 12:07 pm

I've got a 50' hose with a large gravel vac but it doesn't seem to generate enough pressure to suck stuff into the hose and out. Was thinking of replacing with a thinner vac tube but can't seem to find one online. Advice please. Thx.

Dan
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Re: my siphon won't pick up junk- need advice

Postby ken31cay » Fri Nov 08, 2019 12:16 pm

I use a Python with a 50' hose + 10' extension, connected to my utility room's sink where the water pressure coming out of that spigot is pretty good. And I have no issue with gravel vac in my tanks. Is the water pressure really low maybe at the spigot your hose is connected to?
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Re: my siphon won't pick up junk- need advice

Postby jed clampett » Fri Nov 08, 2019 12:22 pm

ken31cay wrote:I use a Python with a 50' hose + 10' extension, connected to my utility room's sink where the water pressure coming out of that spigot is pretty good. And I have no issue with gravel vac in my tanks. Is the water pressure really low maybe at the spigot your hose is connected to?

I'm just using straight siphon power. No sink connection. Don't really have that option with this set up.
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Re: my siphon won't pick up junk- need advice

Postby Deeda » Fri Nov 08, 2019 12:50 pm

Jed, where are you siphoning to with the existing hose, to a level above the tank rim or below the tank rim? I find that when just using gravity, the lower the drain end the faster it drains.
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Re: my siphon won't pick up junk- need advice

Postby Ronzo » Fri Nov 08, 2019 5:07 pm

JC;

Simple siphon is an effective (and free) energy source, but 50ft of hose with just a simple siphon (where I estimate only a few feet max of height diff between intake and outflow, if tank and sink are on the same floor), the hose length will present significant resistance to flow and slow it (so it doesn't surprise me that it is unable to pick up much)...opposed to the 5ft of hose I use to drain into a 5gal bucket (which works like gangbusters to suck up debris!)...is there any way you can shorten path, OR increase height diff (by for instance draining to a cellar drain)?

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Re: my siphon won't pick up junk- need advice

Postby jed clampett » Fri Nov 08, 2019 6:17 pm

Deeda wrote:Jed, where are you siphoning to with the existing hose, to a level above the tank rim or below the tank rim? I find that when just using gravity, the lower the drain end the faster it drains.

siphoning out the door (outside) to a spot about 4 feet below substrate level
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Joined: Wed Sep 12, 2012 11:42 am
Location: VA

Re: my siphon won't pick up junk- need advice

Postby jed clampett » Fri Nov 08, 2019 6:18 pm

Ronzo wrote:JC;

Simple siphon is an effective (and free) energy source, but 50ft of hose with just a simple siphon (where I estimate only a few feet max of height diff between intake and outflow, if tank and sink are on the same floor), the hose length will present significant resistance to flow and slow it (so it doesn't surprise me that it is unable to pick up much)...opposed to the 5ft of hose I use to drain into a 5gal bucket (which works like gangbusters to suck up debris!)...is there any way you can shorten path, OR increase height diff (by for instance draining to a cellar drain)?

I did not consider this. Thanks for the info. I will think about modifying my system.
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Joined: Wed Sep 12, 2012 11:42 am
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