b"HOWTOCONTROLGYPSUMPOURINGINWINTER Toincreasesettingtimeandobtainafluidat the entry sectionandmore solidis a happy medium contrived by: morefluidslurryonthejob,consideratthedischargeend-so,ifyouadda1.Ameasuredgypsumandwater these suggestions.a length of hose or take away a length ofmix. If the material is settingtoo quick, thehose,youchangethec0nsistencyofthe2.Thecorrectlengthofhosefollowingmeasurescanbe takentocor mix.averaging200linealfeetwith rect it:Anotherthingmakingforchangeisjobadjustmentsinrelationto: 1.Check the water usage by measur hose coupling whichhave indentations or3. Measurement of the surface area ing the spread.projections in the inside. Unlessthe hoseandthickness. 2.Use alarger diameter hose. Thecouplingsaresmoothandflushonthe minimum hose size is 21/zinchesinside build-up and quick set is inevitable.Onsomejobs,becauseofjobcondiinnerdiameter,ortakeoffaUse quick-breakhose couplings whichfittionsit maybenecessary to increasethe length of hose.togetherflushwith::smoothinnersur lengthofhoseabovethatrecommended, 3.Pouranarrowerstripeandsetface.Hosesshouldbeflushedoutfre but in no case should more than 300 fett thescreedscloser together.quently toprevent build-up on theinnerof hose be used. 4.Replace the pump with alargersurface of the hose.Morethanthislengthhasbeenused pump or one inbetter workingLet's repeat, if the slurry is too chin andsuccessfullyunderemergencyconditions, condition.Pumpsgettiredtoo,slowsettingatthecorrectmeasuredbut only with close job control and someandwhenthathappensshouldspread(250to275squarefeetpertontimesadditionalretardationofthegypbe repairedorreplaced.of gypsum)add alengthof hose.With sumoverthatnormally used. Ifslow setting isaproblem- and itisoutchangingthemix,theextralengthMixing boxes,tools,mixersandhoses notafrequentproblemthefollowingwill thickenthe mixture atthe dischargemustbe kept cleanandfreefromexcescorrectionsarenecessary:end.sive amounts of set material. 1.Adjustthewaterusagedown- Ifthe slurryiscoothickandfastset Apparentlythemostpopularpump wards.ting, rake off a length of hose and the re usedbygypsumdeckcontractorsisthe 2.Addalengthof hose.sultwillbeathinning ofthemixture Moynopu1npwithahardrubberscicor. 3.Pour awider stripe.without a change in the mix at the mixingThe pump is equipped with a water meter The use of toofewortoo manyhoseend.whichvisuallytellshowmuchwateris lengths or small diameterhose can createNote also, that a pump willlast longerbeingusedinthemixandinsome pouring andqualityproblems.Formostif the correct slurry fluidity is maintainedmodels there is a warning bell. jobs20linealfeetofhoseisadequate.in the hose.Verythick and quick settingThestatorandrotorshouldbefreForjobconsistency,thesamelengthofslurryresultsinacceleratedpumpwear.quentlychecked,andreplacedwheninhose shouid be used in the entire job.Rememberthatthepumpisactuallyspectionoraquicksetofthegypsum Ifyou pump any fluid through a hose,pushingthemixturethroughthehose,showsthatthey are worn. particularlyamixtureof asolidandaandthethickerthemix,the greater theMixing blades also wear away with use. liquid, the mixture changes in consistencystrain onthe pump. This isno argumentThe blades should be of hardened steel 4 with thelength of thehose,being morefor atoofluidmix.Thecorrectbalanceinches or greaterin length. 22JANUARY,1962"