Taem yu yusum manuel valv, oli mas lukluk gud long smol paoa taem valv i open, i no tumas paoa, blong blokem ol aksiden blong ol valv blong han blong man i olsem:
Taem valv i open fulwan, handel i mas tanem smol i go long oposit daereksen blong mekem ol thread oli taet blong blokem lus mo damej. Lukluk gud long stem we i stap kam antap long ples ia, mo tingbaot stret posisen blong valv stem taem hem i open fulwan mo i klos fulwan, blong mekem se i no gat problem wetem top ded senta taem hem i open fulwan taem i open fulwan taem i open fulwan taem i open fulwan taem hem i open fulwan{1}} Hem i help tu blong jekem sapos i gat ful op{1}} I help tu blong jekem sapos hem i . lus, o valv kor siling hap i miksim wantaim bikpela mak bilong ol narapela pipia, posisen bilong stik bai senis taim em i pas olgeta, na dispela bai kamapim valv siling sait o valv han wil tu bai bagarap.
Dispela samting bilong opim valv: taim grov antap long as bilong stem bilong bataplai valv, bal valv na valv valv i wankain olsem senel, em i min olsem valv i stap long posisen i op olgeta; taim valv stik i tanim i go long lephan o raithan long 90 digri, grov i sanap stret long senel, we i min olsem valv i stap long posisen i pas olgeta. Sampela plug valv stem top, bataplai valv, bal valv i go long senel na wrench i go insait long wanpela paralel lain bilong opim, vertikal bilong stop{2} operesen bilong stop{2} Wok bilong stop{2}} Operesen rot bilong stop{2}! opening, klosim na riversing. Bihain long operesen tru, rotari handel i mas raus.
