Golf Catalog | Page 168

REFERENCE STEPS TO GLUE PVC PIPE PROPERLY ∂∂ Cut the pipe square ∂∂ Remove the burrs inside and outside of the pipe ∂∂ Clean the PVC Pipe with a rag to remove dirt and moisture ∂∂ Check the dry fit (The pipe must enter at least 1/3 of the way in without force! If the fit is too tight, file or sand pipe. Don't make flats or gouges on it.) ∂∂ Remove floss by wiping the pipe and fittings with cleaner or a primer, or sand them ∂∂ Apply cement ∂∂ Flow cement on with a full brush ∂∂ Brush a thin coat in the fitting ∂∂ Brush pipe again ∂∂ Keep brush in cement between applications ∂∂ Work fast and don't use too much cement! ∂∂ Assemble immediately ∂∂ Rotate and bottom the pipe in the socket, while the pipe is still wet ∂∂ Rotate only 1/4 turn ∂∂ Hold the pipe for about a minute ∂∂ Important: Get help on large sizes or use a me­chan­ic­ al helper ∂∂ Wipe off excess cement — especially the bead! ∂∂ Let cement dry ∂∂ Wait 30 minutes. If it's 70˚ or hotter, wait 30 minutes; 40˚ to 60˚ — wait 1 hour; 20˚ to 40˚— wait 2 hours ∂∂ Snake pipe in ditch side to side ∂∂ Shade pipe with backfill ∂∂ Use soft dirt without clods or rocks for the first few inches, leaving joints exposed for inspection ∂∂ Set period ∂∂ Depending on the type of cement, size of pipe, air temperature and dry joint tights, your pipe will take a certain time to dry ∂∂ 24 hours is considered to be a sage period to be allowed to stand before testing THRUST-BLOCKING PVC PIPE ∂∂ Water under pressure exerts thrust forces in piping sys­tems at: Changes in pipe size or direction, dead ends and valves. ∂∂ The design of thrust-blocking requires knowledge of the thrust generated and the bearing strength of the soil against which the thrust block will be placed. ∂∂ To be effective, a thrust block must: 1) be placed against undisturbed or fully compacted earth; 2) con­tact the fitting over a sufficiently large area so as not to create stress points on the fitting; 3) have sufficient area on the soil to restrain the thrust with­out exceeding the bearing strength of the soil. 167