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Garden Pond Forums
Newbies to Garden Ponds
Size matters
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[QUOTE="Shdwdrgn, post: 50663, member: 672"] My pond liners and pump were given to me by a friend, who in turn received them from a friend of his. Needless to say, it's been around the block for awhile. The pump is a 3000gph submersible with about a 3' head, all piped with 3/4" sprinkler pipes. Other than building my own skippy filter, this is all set up the way I originally received it. The flow rate has been pretty questionable for a supposed 3000gph pump, but since this was my first setup, I assumed everything was as it should be. Yesterday I noticed the basket or rocks around the pump had accumulated a fairly heavy layer of debris, so I decided to pull everything apart and clean it up. In doing so, I found a small split in the flex tubing that drops the pump into the bottom of the pond and went to replace it. I was unable to find a suitable 3/4" replacement, but they had 1" in stock, so I got that. A quick bit of work on the lathe with a 1"-to-1.25" pipe adapter, and I was able to make a new fitting for the pump with a 1" outlet. Now keep in mind that I have only replaced about 20" of pipe here. The rest of the run up to the filter is still the original 3/4" pipe. Despite this, as soon as I plugged in the pump, there was a noticeable difference in the water flow! So I grabbed some scrap 1" sprinkler line and jury-rigged it up to the filter, and there is now so much flow that my outlets *barely* keep up. Just that small difference of 1/4" diameter in pipe nearly doubles the output from my pump. Keep this in mind when you do the plumbing for your pump... use at least the largest pipe that your pump has fittings for, or you'll be disappointed in the final flow rate. [/QUOTE]
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Garden Pond Forums
Newbies to Garden Ponds
Size matters
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