On Sun, 08 Aug 2004 14:04:27 -0400, Hal wrote:

On Sat, 07 Aug 2004 19:37:37 -0600, "Nathan A. Smith"
wrote:

The reason I ask is I have a veggie filter that is having water feed to it
from a pump and water is returned to the pond via gravity. All the tubing
is of the same size. The pump is putting in more water than my gravity
line can take out. I am trying to figure out my options to correct this.

Best option is increase the gravity flow. I would increase pipe
size. Adding another 1/2 line only increases the pipe volume or flow
by 1, but double the pipe size will increase the volume/flow by about
4.

Put your pump in a bucket and weight it, and set it on blocks if the
water is too deep, so the rim of the bucket is above the water line
and a hole in the side of the bucket is below the water line. When
the bucket fills turn on the pump and see if it empies the bucket.
If the water level in the bucket begins to fall increase the hole size
until you find the right size that allows gravity flow through the
hole to replenish what the pump is taking out. I would pick the next
bigger pipe size for a return line. I would also consider installing
it so I could reach one end of the return line so I could clean it out
with a garden hose.
Regards,
Hal


Thanks for all the help.

After looking closer at my setup, I came to the conclusion that the flow
rate out of the veggie filter was fine. It was the flow in that was too
great. I came to this conclusion based on looking at past post on this
news group. Specifically, water should be in the veggie filter for about
20 minutes before going back into the pond. Thus I reduced the flow going
into the veggie filter. This, of course, lead to the problem of having to
much water leave the veggie filter!

After much trial and error, I discovered my 2nd mistake. I placed the out
going hole to low on the veggie filter box. The more water above the
hole, the faster it will exit the box. (has to do with pressure)

Anyways, thanks for all the input

Nasa