Above-Ground and Below-Ground Specification Guide for SWR Pipe Fittings
Correct specification of swr pipe fittings requires understanding both above-ground stack design and below-ground drainage layout principles. Above-ground fittings must accommodate thermal expansion due to hot waste discharge, achieved through slip-socket or ring-seal joint designs with controlled engagement depth. Below-ground fittings are subject to bedding loads and must maintain roundness under soil pressure. Inspection chambers built from SWR components need to meet minimum ring stiffness ratings. Vent pipe fittings prevent siphonage and maintain atmospheric pressure within the drainage system. IS 14735 compliance testing includes leak tightness and impact resistance.