Question about siphon hoses

Jannika

Jannika

MTS Survivor
Mar 17, 2010
1,498
0
36
N. California
I bought this siphon hose/gravel cleaner because I needed a little bit more length and the hose is a bigger diameter. It also has a flow control valve. Well, the suction is weaker than my old one, and the design is bad because the end tends to flop out of the bucket, and you have to put your hands in the bucket to shut off the valve.

My question is, will cutting the length of hose down increase the suction? Also, I'd like to move the gate valve closer to the other end, and have a shorter pigtail that will stay in the bucket. Will that work?

hose.jpg
 
the size of the hose not the length determines the 'speed' it drains. a 1 inch diam hose of course will flow faster than a 1/2 inch.
 
Jannika said:
That's what I thought, but my shorter, smaller diameter hose drained faster than this one.
Click to expand...

You only think it did. Let me explain: driving down the interstate when you are in the middle of the road, ever notice how slow thins seem to go by, compared to when you are driving by say some construction barrels at the same speed and they just whiz by.

The same thing has happend with the hose. I would bet money (I don't Bet) that the larger diameter hose will fill up a 1 gallon jug faster than the smaller diameter hose all day, any day, and even at night.

Best wishes,
Wes
 
the valve and any other impediment in the hose to fluid flow will slow the water down... it possible that the valve in the open position is still slowing your water down a bit. is it possible to remove the valve and test the siphon without it?
 
wespastor said:
You only think it did. Let me explain: driving down the interstate when you are in the middle of the road, ever notice how slow thins seem to go by, compared to when you are driving by say some construction barrels at the same speed and they just whiz by.

The same thing has happend with the hose. I would bet money (I don't Bet) that the larger diameter hose will fill up a 1 gallon jug faster than the smaller diameter hose all day, any day, and even at night.

Best wishes,
Wes
Click to expand...

hmm, can't quite wrap my head around this. not sure what that example is illustrating?
 
axelfoley said:
the valve and any other impediment in the hose to fluid flow will slow the water down... it possible that the valve in the open position is still slowing your water down a bit. is it possible to remove the valve and test the siphon without it?
Click to expand...

I will try that, thank you AxelFoley. If it doesn't improve I think I will return it instead of cutting it up. Something is definitely wrong, it takes 5 minutes to fill a bucket and doesn't vacuum well at all.
 
the diameter of the vac will affect your suction as well. The narrower the vac (not the hose) the greater the suction because you have the same amount of water trying to move through a smaller space so if your old vac had a smaller tube on it that would explain why this one seems to have less suction.
 
This look like one of those "asian" siphon I see on ebay. While I like the idea of having the siphon pump for starting the siphon, I believe that's what slowing your flow down. If you take the siphon out, I bet your flow would be much faster. I prefer the traditional vac tube and all you need is to fill it up and tilt it on the side.

I do see the benefit of having a valve at the end. I put valve on the end of my custom vac tube as well.
 
You must log in or register to reply here.
AquariaCentral.com
Top Bottom