Designation:F2158−08(Reapproved2013)AnAmericanNationalStandardStandardSpecificationforResidentialCentral-VacuumTubeandFittings1ThisstandardisissuedunderthefixeddesignationF2158;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisspecificationcoverstheestablishmentofrequire-mentsandtestmethodsformaterials,dimensionsandtolerances,flatteningresistanceandimpactresistanceofplastictubingforuseincentral-vacuumsystemsforresidentialbuildings.1.2Allnotesandfootnotesshallbeconsideredasnonman-datoryrequirementsofthespecification.1.3Thisspecificationdoesnotapplyto:inletvalvemount-ingplatesoffittingsdirectlyconnectedtotheseplates,reducerfittings,mufflersexhaustvents,orflextubingattachedatthepowerunitlocation.1.4Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatoryrequirementspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D618PracticeforConditioningPlasticsforTestingD1600TerminologyforAbbreviatedTermsRelatingtoPlas-ticsD1784SpecificationforRigidPoly(VinylChloride)(PVC)CompoundsandChlorinatedPoly(VinylChloride)(CPVC)CompoundsD2122TestMethodforDeterminingDimensionsofTher-moplasticPipeandFittingsD2444TestMethodforDeterminationoftheImpactResis-tanceofThermoplasticPipeandFittingsbyMeansofaTup(FallingWeight)D2564SpecificationforSolventCementsforPoly(VinylChloride)(PVC)PlasticPipingSystemsD2749SymbolsforDimensionsofPlasticPipeFittingsD5033GuideforDevelopmentofASTMStandardsRelatingtoRecyclingandUseofRecycledPlastics(Withdrawn...
