Master Massachusetts Plumbing Questions and Answers

Master Massachusetts Plumbing Questions and Answers 4 pounds - answerSheet lead for safe pan 3 pounds - answerLead roof flange 1/8" thick - answerBrass toilet flange 1/4 " thick - answerCast iron flange Are cast iron cleanout plugs allowed - answerNo Rodding cleanout distance on 3" and bigger - answerClearance is 18" Rodding cleanout distance on 2" or less - answerClearance is 12" CPVC or Pex piping allowed for Hot Water Heaters or Boiler - answerNo closer than 24" 0% lead - answerLead free solder should contain 0% 3% lead fixture - answerMax lead in a faucet fixture Why use rector seal - answerLubricates and creates water tight seal Transition from abs - answerPVC to ABS connections to be made via male to female adapter 24" - answerFixture outlet to trap weir not to exceed 24" Combination Fixtures - answerMax 30" apart and no more than 6in deeper than another Prohibited traps - answerBell, crown vented, full "s" traps- *Drum Traps are allowed! Min trap seal - answerMin trap seal is 2-4 " Deadend Pipe - answer2' or greater 10" underground pipe or larger - answerManhole @ change of size, alignment, grade or elevation Grease trap - answer2 pounds per gpm Commercial Laundry - answerCommercial Laundry drain must handle 75% of total washing machines Shower Stall - answer900 Sq in or 30 measured as the side of a rectangle (interior dimensions). Shower Pans - answerShower Pans must be turned up on all sides at least above the threashold Shower temperature - answerShower head not exceed 110 or 112 Trapping commercial food grinder - answerCommercial food waste grinder trapped separately Washing Machine standpipe - answerWashing machine stand pipe min is 30" above the base of machine and 18-30" above trap and discharge through an air break Sacrium - answerSacrium drains in a dry well 1 DFU - answerEquals 7.5 GPM Back water valve - answerBack water valve on outlet pipe on ejector Minimum GPM on Residential Ejector Pump - answerResidential Ejector Pump minimum is 20 GPM Sanitary Tee - answerNo longer called an Esterbrook No trap required - answerNo traps required on indirect waste main or branch main Special Hazardous Waste - answerSpecial Hazardous Wastes are marked yellow and are 25 feet apart Max Hot Water - answerResidential hot water 130 degree max temp Max temp into drainage system - answerMax temp is 150 degree allowed into drainage system Mechanical Pressure Absorbers - answerLocated at the end of long runs of water pipe Saddle valves - answerProhibited on water and drainage lines Sillcock psi - answerMinimum PSI at sillcock 10 psi and 5 gpm Residential PSI - answerPressure greater than 80 psi in a house requires a pressure reducing valve Safe water - answer3" in diameter tag with letters, 1/2 " height marked every 25'