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"Look in your toilet tank." Good point! Thanks guys.

I would like to boost the incoming water pressure to some equipment. I want to connect the city feed to a 200 gallon storage tank. I need a valve that will open and close when the high and low level controls signal the tank is either low or full. Any suggestions on what components I can use...

I just installed a POU system with DI, UV and Ultrafilter. Looks like they want to shut down the loop system.

OK. Thanks so much. I'm going to be concentrating fully on this system next week. I'll have lots of information and data to share ,,, and of course more questions ,, Have a great weekend and thanks again!

"calculate the maximum flowrate of a single faucet, multiply this by the number of faucets, add in any equipment that could possibly draw water as if the equipment were running with every faucet open (glasswash equipment ect) and add in the additional 5 GPM you mentioned. Do you think this would...

I know what the guidelines are for Dialysis. It all falls under RD52 ,, In 15+ years I've never failed to meet the AAMI water guidelines, actually I have produced better water quality every time than what the spec calls for. I was told once Amines from virgin resin are not good for dialysis...

"Minimum flow is that flow that will provide 3-4 ft/sec flow velocity." Wouldn't it be necessary to know the pipe length and diameter in order to calculate this? If so, I have no schematic of the pipe layout, how would I achieve this? I have always had a very high success rate using...

"plus add the minimum flow in the line" How would I know what this is? If I experience chlorine break through after the carbon tanks it will make the mixed bed deionizers work harder during the exchange process, correct? That has been my past experience. I don't buy the channeling either but...

The final filter is a replaceable 30" 0.2 Micron with 222 O-ring. The filter pressure brings me yet another question. If the pump is rated at 8 GPM for best performance, wouldn't you agree the loop was most likely designed for the flow-rate I have going through it now? I realize there is no...

You've been a great help here and I really appreciate that. Now for the hard part. I really gained nothing on my final filter for pressure. At Initial start-up I got 10-20 PSI. Do you think in order for me to gain greater pressure across the filter I should throttle the return valve even more...

The pump is putting out 8 GPM now. That is the best flow-rate according to the Webtrol technical department. The flow at the faucets is good - even though there is no flow meter within the loop to know the actual flow - The one revolution on the return valve must have created the back pressure...

I got a call of no water in the labs. Checked out the system when I arrived and the pump flow gauge still read 14 GPM. Checked the labs - No water - Went to the valve and made one revolution on the screw. Watched the pressure gauge on the return to the pump and it increased 10 PSI. Returned...

I'll be going there Tuesday to make the adjustment. I still have questions but don't want to overburden the answerers with them with all the questions at once. I also have an idea of scrapping the two pumps altogether and going with a jet-pack style pump. I've looked at a good number of...

OK ,,, I'll crank it in on the return. That shouldn't starve the pump in any way right? So what purpose do you suppose the other valve serves?

Probably returning there tomorrow. So which valve? The one on the return line? I did bypass the final filter the other day, it plugged.

Should I crank the valve on the return in?

Went back and checked both valves for markings today.http://files.engineering.com/getfile.aspx?folder=3c47fe4c-dd77-4bd5-b5e3-f9b7782af1bf&file=Possible_Spears_Valve.doc

I'm going back Monday to take a look at the valves. Did a job in Maine today. If you'd take a look at the attachment. Thanks again for all the help.http://files.engineering.com/getfile.aspx?folder=50d45c8f-0dff-4b91-9894-fb2bb378d7f6&file=Valves.doc

I'll take another look at the valves. (It looks like there is a PRV on the recirculating line after the probe and before the temperature gauge.) Are you referring to the valve at the low point in the picture or the valve to the top tight? ref: Pump picture Also, should it be a PRV or back...

Question. How would I be able to know if the valve in place is either a PRV or a back pressure valve? There are no markings on either valve. (the one from the feed source or the one that returns to the pumps) I take it you were able to figure out the layout from what I posted?