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Re: AIR SUPPLY PLUMBING


                 I use a Thomas diaphragm pump, and have been for 30 
years.  they lst about 12 -15 years and cost about 150 dollars.  I pipe the 
fish room with 3/4 and 1/2 inch PVC.  My 3/4 inch pipe is 30 years old and 
is schedule 80 which was the first pipe available.  I have screw type brass 
valves in this pipe because they thread through the thick pipe. Also 
because that was all that was available.   For the past 15 years I have use 
plastic valves that are available everywhere at about 20 cents each.  I 
drill a hold in the PVC and insert the valve.  the valves come apart  ..so 
if they ever need replacement because they are not holding the pressure, I 
pull them off and replace them.

                 Must say I have not replaced a plastic valve in 10 
years.  The pump has a stand 1/4" output, I immediately climb to 1 inch 
flexible clear pipe for 3 feet to reduce vibrations; then I go to hard PVC.

                 The Thomas pump is listed in Granger Catalogs and has 
worked well.  I am leaning toward a new linear pump when my newest pump 
(9years old) wears out.

                 I will make a photo available  to the list if anyone is 
interested :

http://albums.photopoint.com/j/View?u=1161752&a=8547080&p=30925422

                                 Tony


         At 12:11 PM 10/17/00 -0700, you wrote:
>Hi to All,
>I am planning on getting a central air pump and piping air to each of my
>killie tanks.
>I am leaning toward a linear piston pump, PVC piping and brass needle
>valves[Penn Plax style], and sponge filters/gravel filters.
>What size piping would anyone recommend for about 40 tanks involving about
>75-100 linear feet?  1", 1 1/4", 1 1/2", 2"?
>Any other precautions/recommendations?
>Any comments on Siporax as a bio-filtration medium?
>Thanks in advance.
>mike stoecker
>
>
>---------------
>See http://www.aka.org/AKA/subkillietalk.html to unsubscribe

Anthony C. Terceira, Consultant
253 Central Pike
N. Scituate, RI      02857

(401) 647-5238
(401) 647-3798  fax

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