Why are these plumbers hanging drywall? - Plumbing & HVAC

Pat. PendingTMHot Water HeatingDHW heat trapA new heat trap design on BradfordWhite residential gas and electric DHWheaters reduces heat loss through thecold water inlet and hot water outlet.This small disc inserts into the top ofthe fitting. It can also be retrofitted onolder non-heat trap style dip tube andanode rod assemblies.Bradford White Canada Circle no. 339Zone valveThe new 5000 Series zone valves fromHoneywell feature ‘soft close’ technologyto reduce water hammer, ‘Quick Fit’pushbutton actuator removal and rotatingball seal design. They are available ina wide range of models and valve bodystyles.Honeywell Ltd. Circle no. 340Condensing boilerThe Olsen Quantum 95-200M modulatingboiler operates at 95 percentAFUE at a minimum-maximuminput of 80 and 200MBH with a nearzero pressure drop.This reduces theneed for high headpumps or a primary/secondarypiping system. Otherfeatures include amanual reset probe, options for outdoorreset and a summer-winter switch.Olsen Div., ECR Int’l. Circle no. 341Tankless heatersThe new T-H1 tankless water heaterfrom Takagi features a pre-heating systemwith dual heatexchangers thatheat water in aninstant two-stepprocess to deliver10.5-gal./min. at94 percent thermalefficiency. Acondensation collectorcapturesexhaust gases andthe neutralizer softens the water. Itweighs 92-lbs. and is designed forindoor or outdoor applications.Takagi Circle no. 342Product ProfileSystemsimplificationA new all-in-one injection mixingsystem promises to make lifeeasier for hydronic heatingcontractors.The RadiantMixing Blockfrom Taco is acomplete piping,pumping,air eliminationand controlThe compactTaco radiantmixing blockreplaces anumber ofcomponents.package. Itcombines avariable speedinjectionmixing control,injectioncirculator,system circulatorand air elimination into asingle unit. It can be set up as anoutdoor reset control, a setpointcontrol or a delta-T limiting control.This unit can handle radiantheating load demands to120,000 Btu/h.There are four pipe connections.Hot water from the boilerenters the Radiant Mixing Blockat the boiler supply port. Coolerreturn water enters the systemreturn port. Air between theseports is purged. The injectioncirculator varies in speed to blendthe two water temperatures,injecting the excess temperatureback through the boiler returnport. The constant speed systemThere is a considerable laboursavings in piping.circulator delivers the requiredblended water temperature to theradiant loop through the radiantsupply port.Installation for zoning radiantloops need not change. No specialpiping is required.The unit comes with a replaceablewet-rotor cartridge, an integralcheck valve and a large LCDdisplay.The Taco Radiant Mixing Blocktook first place in the hydronicheating category of the NewProduct Showcase awards at theMarch Mecanex-Climatex show inMontreal.Taco (Canada) Ltd. Circle no. 343Circle Number 129 for More Information28 Plumbing & HVAC Product News – May/June 2005 www.plumbingandhvac.ca