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The OS&Y valve is recommended in many cases in which anyone can see far away whether the valve is open or close. That indication allow, for instance, in fire protection systems to take quick action when the valve is closed and has to be open all the time.

I have been used the Hunter methodology for several years and I know that the Hunter curve for discharges is higher than that used for water supply. Hunter is generally accepted for internal plumbing to the connection at the general drainage systems, not using any reduction factor its...

When choosing a pump for grease, you should go for submersible pump with open impeller. These are pumps for waste water and not any mass of grease could be trapped into the pump.

You must to send to lab samples of soil you plan to use and make that folks to testing it with different %s of cement. Then you know what is the percent of cement whit the max strength. Have in account the content of water.

It looks like you are pumping waste water from a septic tank before completing the anaerobic process. That is the smell producer. You can't blame the plumbing for the smell produced by the waste water. Try to have ventilation at the tank from you are pumping, an ventilation at the manhole where...

To have just one pad for the 4 tanks is quite cost due that tanks have to have a separation according with NFPA if the tanks are for combustible or any other inflammable liquid. The concrete slab is recommended for low bearing capacity of soil . It has to be calculated by structural Eng for...