Kuyilo lokuqala lweUmbhobho we-PPR, kuqwalaselwa izinto ezintathu ezibalulekileyo, ezizezi: ubomi benkonzo yombhobho, ubushushu bokusebenza kunye noxinzelelo lokusebenza. Ezi zinto zintathu ziya kuchaphazelana, ngoko ke iiparameter kufuneka zihlangabezane neemfuno ezichaziweyo.

Ixabiso loxinzelelo oluthiUmbhobho we-PPRukuba iyakwazi ukumelana nayo kufuneka isekelwe kubomi boyilo lombhobho kunye nobushushu kwindawo yokusebenza njengemfuneko.

Ngokusekelwe kwiiparameter ezintathu ezingentla zobomi benkonzo, ubushushu bokusetyenziswa kunye noxinzelelo lokusetyenziswa, sinokugqiba ngemithetho emibini:

1. Ukuba ubomi obuqhelekileyo benkonzo yombhobho we-PPR bumiselwe ukuba bube malunga neminyaka engama-50, kokukhona ubushushu bendawo yokusebenza yombhobho oyiliweyo buphezulu, kokukhona uxinzelelo oluqhubekayo lokusebenza olunokumelana ne-PPR, kwaye ngokuchaseneyo.

2. Ukuba ubushushu boyilo lombhobho we-PPR budlula i-70℃, ixesha lokusebenza kunye noxinzelelo oluqhubekayo lombhobho we-PPR luya kuncipha kakhulu. Kungenxa yokusebenza kakuhle kwemibhobho ye-PPR ngaphantsi kwe-70°C ukuba imibhobho ye-PPR ibe yeyona ishushu nebandayo kakhulu.imibhobho yamanzi, kuba ubushushu bamanzi ashushu asekhaya bungaphantsi kwama-70°C.

Kukho iintlobo ezimbini zemibhobho ye-PPR: umbhobho wamanzi abandayo kunye nombhobho wamanzi ashushu. Yintoni umahluko?

Iipayipi zamanzi abandayo zincinci kakhulu. Enyanisweni, kuyacetyiswa ukuba uthenge zonke iipayipi zamanzi ashushu, kuba udonga lweepayipi zamanzi ashushu luqinile kwaye ukumelana noxinzelelo kulungile. Kukho iintlobo ezimbini zeentsapho ngokubanzi: ezi-6 ezitshajayo (ububanzi bangaphandle obuyi-25 mm) kunye nezi-4 ezitshajayo (ububanzi bangaphandle obuyi-20 mm).

Ukuba uhlala kumgangatho ophantsi, uxinzelelo lwamanzi luphezulu, ungasebenzisa umbhobho otyebileyo onamanqaku ama-6, ukuze amanzi abe makhulu kwaye angakhawulezi kakhulu. Ukuba uhlala kumgangatho ophezulu, njengomnini okhankanywe ngaphambili, ohlala kumgangatho wama-32, kufuneka udibanise imibhobho etyebileyo nebhityileyo. Kucetyiswa ukuba usebenzise imibhobho emi-6 kumbhobho oyintloko kunye nemi-4 kumbhobho wesebe ukuze uphephe uxinzelelo lwamanzi olunganeleyo ekhaya.