Heating Helper

CHAPTER 1 - STEAMB. Dropped Header PipingSTEAM SUPPLY MAIN - SLOPE DOWN FROMHIGH POINT ABOVE BOILER AND DRIP ENDSOF MAINS INTO WET RETURN - LOW POINTOF SUPPLY MAIN TO BE NOT LESS THAN 28"ABOVE WATER LINEMINIMUM PIPE SIZEMST288 / MST396 / MST513 MST629PIPE DISCHARGE TO WITHIN 6"OF FLOOR OR DRAINRISERKEEP COLD BOILERFILLED TO NORMALWATER LINEN.W.L.24" MINSAFETY VALVERISEREQUALIZERGLOBE VALVE31 1/8 (MIN)31 7/8 (MAX)WATERMETERFLOORLINE2" GRAVITYRETURNBOILERMAKE-UPWATERREAR OFBOILERRETURNNOTE: FOR BEST PERFORMANCE, TWO RISERSARE STRONGLY RECOMMENDEDSUPPLY MAIN TO BE TAKEN OFF TOP OFHEADER VERTICALLY OR AT A 45° ANGLE24" MINADDITIONAL SUPPLY MAINS(AS REQUIRED)HARTFORD RETURNCONNECTIONPREFERRED PIPINGALTERNATE PIPINGTEECLOSE OR SHOULDERNIPPLE ONLYGATE VALVESTEAM-WET RETURNPITCH DOWN TO BOILERPROVIDE DRAIN VALVES FORFLUSHING BOILER AND SYSTEMN.W.L.ALTERNATE PIPING METHOD27