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nugusc zs, IVS� <br /> City of Everett <br /> Public Works,City Enginccr <br /> 3200 Cedar <br /> Evcrett,WA 98201 <br /> Larry: <br /> On your inspection visit to Project Site 414 View Ridge Dc,8verct�,WA,Mechanical <br /> Permit N40450,several concems were raised: <br /> I) Would the PVC schedule 40 in ihe chimney be distorted by boiler exhaust gages? You <br /> askcd mc to ehcck tcmpera�urc rating of schedulc 40 pipc. <br /> 2) TemperaNre of watcr tank and boilcr(oil)cxhausts. <br /> As a result of your concems,1 did research this and found the following: <br /> I) Upon talking to Rheem Mfg.(Vanguard),in Montgomery Alabama,Ihc scrvice <br /> cngineer's told me that PVC schedulc 40 is rated to 300 dcgrees. <br /> 2) So et this time,I took tempemture rcadings on the stacks and the results were found to <br /> be 250 dcgrecs for the wa�cr tank and 225/240 degrees on the boiler system. Thcse <br /> iemperatures as you notice fall wcll wilhin the ra�ing of schedule 40 PVC. <br /> I might also mcntion thc question about tlic chimncy. Wc had wondered why�hc <br /> manufacturcr said in thc booklct not to vcnl in a chimncy or duct work and i found ow in <br /> talking to Rhccm Mfy.'s Gnginccr that it is not a safcty qucstion,but rathcr an operaiional <br /> concern. Their concem is ihat back pressure could stop�he water heater from starting, <br /> due to holding out the pressure switch,othenvise ihey e�pressed no concem. <br /> I hope this Ietter addresses your coneerns and appreciate your Ihoroughness in matters of <br /> I safety. <br /> Sinccrcly, <br /> / <br /> ,C`�� /ti.t�';'.�{/�l� <br /> Ned Ludington �' <br />