1920 MERRILL CREEK PKY 2018-01-01 MF Import

'-• --'•-"••"a I\7RACORP ++- SEAaA1' �['0: •Y•, L!� FACTORY MUTU � A L j � Actory Mutu�l Enjineetint Associuinr � � ��^'E�th Strect April 7, 1997 �� suue�Op � 1� P.O.Box 960'7 a�VF"! Bell��ve. Wzy�inEton 98U1y-gG77 . Telcphune(t0�)qsi-;931 Kr• �ill Foster, Project Nanager Fut�o��F3��2�9g Intracorp Fax (206) 349-2276 Re: Fire Pump Test INTRACORP ^Seavay Ceater� Lverett, VA • Index 78688.62 Account 23-19362 Desr Bill, This letter vi12 provide documentaeion regarding the reeenc fire p�p testing I conducted vith Nr, Pete Marhinney, Field Saperintendent vitA Smi[h Fire Systems. As detailed belov there are several items vhich vill need to be completed prior to our acceptance of the pump installation. The fire pump vas flow tested through a 3 1/2 in, test header ae various flovs ehroughout it•s range, end vas also sub�eeted to a seziee c+f automatic and manual starts, Ihe ptuop snd it's cor.troller w�re found to operate vell throughout it's operating range, up to a maximun Flov of 2,SGU gallons per minute. � Though the punp itself opezated vell, there is a concern :egarding the \ in�oming vater supply to the site. A :ire hydrant test vas also conduc:ed ) on the day of the purp teat. The hydrant next to the pumphouse vas floved � vi�h pressure taken from a hydrant at the soatheast corner of Buildinb g, The test results are 45 psi static, reducinQ to 25 psi at a flov of 1,33G SPm• T'his ia aignificantly different that the resulta of Che test conducted at the site by Smith Fire Systems on Decenber 18, ]996. The results of the December test vere static_pressur�5a psi_cedt�cing co 30 psi _— at a flov of-2;>24 gpm, The settzng of the pzessure reducins valve'i's-- likely the reeson Zot Lhe ditfezence. Please provide a responee to us regarding the folloving recorm�endations. 1• The preasure rediacing valve on one of the tvo incoming lead-ins Co the site should prefetably be renoved. 1 do not have a detailed understanding of the vater suppl}• to this site, but believe that a pressure reducing valve at this particular site is unnecessary, and is adversely affecting the vater supply to this site. If the pressure reducir,g valve Rust stay, then the setting on the valve sAould be changed such that th= vater supply at the site is ae it vas during Che December 1996 test. The concern vith the present setting is that the ineoning vater pressure d:ops belo� 20 psi vhen the fire pump is operating at it's higher Elevs.