Gritty Sprinkler Fitter

Control valves: listed indicating valves, PIVs and wall PIVs, check valves, and the four ways to supervise a valve. We cover valve location and accessibility, no shutoff in the FDC line, valves on both sides of a check, PRVs at 175/165 psi with the half-inch relief, PIV height of 32 to 40 inches above grade, floor control assemblies, Minnesota's locked-open valve security rule, and NFPA 25 valve ITM.Two fitters, a lot of swearing (18+), a lightning round, and a war story about a tagged valve, a hidden second feed, and a face full of water. Numbers are from NFPA 13-2019 with 2016 section numbers where Minnesota still points (Minn. R. 7511.8000), plus Minnesota amendments in Minn. R. 7511.0903. Check the edition your exam uses. NFPA 25-2020 for ITM.App news: Minnesota Journeyman Exam Prep is available now on Google Play (Android only). Thanks to our closed testers. Link below.Google Play: https://play.google.com/store/apps/details?id=com.mnfireexamprep.app

The Hazen-Williams formula in plain English, the C-factor table (100, 120, 140, 150), why the fitting table is "C = 120 only" and how the multipliers work, equivalent lengths for elbows, tees, and valves, what's in and out of the calc, feet of head vs. psi, and K = Q/√P with worked examples. Minnesota adopts NFPA 13-2016 (Hazen-Williams is 23.4.2.1.1 there), and we flag it.Plus a war story about one branch line, eight extra elbows, and a remote area that came up short.Explicit language. 18+ only.Testers group: https://groups.google.com/g/mn-journeyman-exam-testersAndroid app testing: https://play.google.com/apps/testing/com.mnfireexamprep.app

Class I through IV, Group A/B/C plastics, cartoned vs. exposed, the 5/15 and 5/25/40 percentage rules, plastic pallets, open vs. closed arrays, rack types, flues, mixed commodities, and the general information sign. Minnesota adopts NFPA 13-2016, so we flag the 2016 numbers alongside 2019.Plus a mattress-warehouse war story about what happens when the stuff in the boxes changes and nobody reads the sign.Explicit language. 18+ only.Testers group: https://groups.google.com/g/mn-journeyman-exam-testersAndroid app testing: https://play.google.com/apps/testing/com.mnfireexamprep.app

Is there enough water, for long enough? At least one automatic supply, what counts as a supply, the 6-inch private main rule, pressure tanks, a live two-hydrant flow test (static, residual, measure the outlet), 0.433 psi per foot and 2.31 feet per psi, then the two evil-twin tables: hydraulically calculated hose stream and duration (100/250/500 gpm; 30, 60-90, 90-120 min) vs. pipe schedule (15 or 20 psi at the top, flows that already include hose). Inside vs. outside hose, where each gets added, monitored-system lower durations, mixed hazards, minimum design areas, tank math, and the hydraulic sign.Two fitters, a lot of swearing (18+), a lightning round, and a war story about an eleven-year-old flow test and a water park that stole the water. Numbers from NFPA 13-2019 with 2016 numbers where Minnesota still points (Minn. R. 7511.8000). Check your exam's edition.App news: the MN Journeyman Exam Prep Android app has enough testers and the 14-day Google Play countdown has started. It should go public in a couple of weeks once Google reviews it. Thanks, testers. We'll tell you the minute it's live.Google Group: https://groups.google.com/g/mn-journeyman-exam-testersPlay testing: https://play.google.com/apps/testing/com.mnfireexamprep.app

The plain-Jane system nobody studies. How an alarm check valve and retard chamber actually work (and why a plugged retard drain makes the outside bell ring like a drunk church), gauges above and below the check, the relief valve "175 psi or 10 over, whichever is greater," the more-than-20-sprinklers local alarm, 3/8-inch vs. 3/4-inch alarm piping, the 3/4-inch strainer, alarm bypass test connections, paddle switches (wet only), and the wet inspector's test connection: 1 inch, smooth bore, smallest K-factor or less, anywhere downstream of the flow device, alarm within 5 minutes.Two fitters, a lot of swearing (18+), a riser-room troubleshooting round, a lightning round, and a nursing-home war story about a booster pump, a 2 a.m. gong and a fire captain with donuts. Sprinkler-side only; the NFPA 72 panel side was its own episode. Numbers from NFPA 13-2019 with 2016 numbers where read (Minn. R. 7511.8000 still points to 2016). Check your exam's edition.App news: the MN Journeyman Exam Prep Android app has enough testers and the 14-day Google Play countdown has started. It should go public in a couple of weeks once Google reviews it. Thanks, testers. We'll tell you the minute it's live.Google Group: https://groups.google.com/g/mn-journeyman-exam-testersPlay testing: https://play.google.com/apps/testing/com.mnfireexamprep.app