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        Q: Is sluice valve and gate valve same?
A: Gate valve is crucially engendered for an on-off servicing , it isdesignated to control the pressure drop and allowing the passage of apipe-cleaning pig . Gate valve is feasible to also-called as knife valve orslide valve . 

Q: What is the difference between o s & y valve and the normal gate valve ?
A: Outside Screw and Yoke ( OS & amp ; Y ) . used mainly in fire prevention . 

Q: How to shut off the water to the house?
A: It is a gate valve and the gate will have dipped off the screw threading . what will happen is the final 1/2 turning of the threaded strips and later the gate will not pick up again . A gate valve 're not the accurate type of valve for thutilized , , normally in the UK we use a washer type of valve for mains pressure and a gate valve for insulating tank supplies and isolation valves on these items as pumping or independent circuits on heating systems . A gate valve will give a full bore flow with small reduced in flow rates .   To the other side of the water metres between the meters and the `` T '' joint they looks to be a ball type valve this situation is a 1/4 turning for totally on or totally off and will stopping the flow while amending the gate and stemetres of the other valve . Keep all taps closed having verification that the supply is totally turned off . Have a bucket handy as some water will leak when you remove the entrails . The more challenging part will be getting an identical make valve in order to just replace expected entrails solely . If you 're incapable to get an identical valve subsequently it could is greater cautious to get a plumber in as you are able encounter imperial piping as against metric sized and also you are able have to solder the new valve in .