2025-12-29 – Weekly Plumbing News : Left-handed wrench speculation

Last week, the community engaged in a variety of discussions ranging from practical tips to professional development. Members explored innovative solutions for heat recovery in high-rises and debated the merits of different torque drivers for no-hub couplings. There was also a lively exchange about maximizing the effectiveness of continuing education, alongside personal stories about adjusting to new team dynamics.


This Week’s Hot Topics

Left-handed wrench at dawn
This thread speculates about the utility and potential advantages of left-handed wrenches in certain scenarios, sparking curiosity among members.

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Drain heat recovery in high-rises
A timely discussion on the efficiency and environmental benefits of drain heat recovery systems in large buildings—a must-read for anyone working in urban settings.

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Best 60 in-lb torque driver for no-hubs
Members are sharing insights and reviews on torque drivers, aiming to find the best tool for securing no-hub couplings. It’s practical advice for those in the field.

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Why is it called Schedule 40
An exploration into the naming conventions of piping schedules, providing clarity on a fundamental yet often overlooked topic in plumbing.

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Fastest way to stop a midnight leak
A collection of quick and effective strategies for dealing with unexpected leaks, shared by members who’ve been there.

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Hands-on CE that beats slide decks
This thread focuses on making continuing education more engaging and applicable, with members offering suggestions based on personal experiences.

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Using our paid training hours smartly
A practical discussion on how to optimize training time, ensuring it translates into tangible skills and benefits on the job.

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First month on a mostly male crew
Personal reflections and advice shared by a member navigating the dynamics of a predominantly male work environment, offering valuable insights.

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Looking for CE on 2024 UPC/IPC
An inquiry into the best resources for continuing education focused on the upcoming 2024 plumbing codes, drawing suggestions from the community.

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Thanks for staying engaged with the community. Looking forward to more insightful discussions this week.

2 Likes

On the torque driver debate, I’ve had fewer callbacks by “snugging every band first, then torquing to 60 in‑lbs in a cross pattern,” and rechecking after 10–15 minutes because the gasket settles, especially in cold shafts. Impact drivers are tempting, but even the $25 T‑handle torque wrench does a better job; if the spec calls for 80 in‑lbs (some Mission shields), I swap drivers instead of guessing.

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I bring one tough job photo to CE and ask ‘fix this?’; better than webinars, though webinars suit code updates.

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Quick tip from a 22‑story retrofit last spring: vertical drainline heat recovery on the shower stacks (3×4" with about 18’ exchanger per stack) bumped HW return about 9°F and shaved about 12% gas, but it only behaved after we added a cleanout tee and quarterly flushes — , laundry lint was killing it; if space is tight, stick to showers and skip kitchen stacks. Good overview here: https://www.aspe.org/pipeline/thermodynamics-of-drainline-heat-recovery-systems/.

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One little habit that’s saved me grief on no-hubs: after final torque, I put a paint-pen witness mark across the screw and housing and do a quick recheck when the line first warms; if the mark moves, I retorque and note it on the pipe. I still check the T-handle in the shop with a 5 lb weight at 12 inches — “trust but verify” — but if the screw feels gritty, I swap the coupling instead of muscling it. No left-handed wrench required.

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On the torque-driver debate for no-hub couplings, I keep a 1/4-in beam torque wrench in the gang box and ‘trust but verify’ the cordless clutch every few bands; most 60 in-lb presets drift after a dozen clamps or in 40°F weather. For 5-in and up, I finish by hand to 80 in-lb with the beam so I know it’s uniform, even if the driver says it’s done. Specs vary by brand, so I check the band label before torquing.

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For continuing ed, the sessions that helped were live job clinics — bring a real submittal or change order and make the instructor “show your work”; 45 minutes beats a 3‑hour webinar. If there’s no Q&A or a take‑home checklist, I skip it and put the fee toward a half‑day ride‑along or a $60 manufacturer course instead.

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Quick tip on bands: before a run, I sanity-check the driver with a ‘5 lb at 12 in about 60 in-lb’ hang test on a sacrificial clamp, then switch to a sharp 5/16 socket so angle/cam-out doesn’t fake the torque… Not a real calibration, but it flags bad settings fast — no left-handed wrench required.

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Quick example: on a high‑rise retrofit, we mounted a drain heat recovery coil on the main shower stack and piped its outlet to the DHW recirc make‑up; it kept the mixing station steadier than feeding individual fixture colds and netted about 12–15% gas savings. Caveat: it only shines with steady vertical flow — ‘if it isn’t vertical, it isn’t working’ — so skip it on short horizontal runs or low‑occupancy tiers. It’s a coffee thermos for your drain; leave access for cleaning and tag the bypass so night shift doesn’t valve it out.

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