SharkBite Fittings, PEX Crimp Tool Kits, and the Rental Trap: Mistakes That Cost Me Real Money

I'm not a licensed plumber. I'm a facilities coordinator who has been handling maintenance and repair orders for nine years. I've personally made (and documented) 14 significant mistakes, totaling roughly $6,800 in wasted budget. This is the checklist I wish someone had handed me before my first order. It covers the questions our team actually searched for: SharkBite fittings, the SharkBite PEX crimp tool kit, the SharkBite 90 degree female elbow push fitting, a press brass ball valve inline 77VLF, pruning shears reviews, and 'can I rent a welding machine?'

Should I buy the SharkBite PEX crimp tool kit or just use push-fit?

Depends on how many connections you plan to make. In 2021, I ordered the SharkBite PEX crimp tool kit because it looked like a no-brainer compared to paying a contractor. The kit itself was fine, but I forgot to order PEX rings and tubing. What I mean is: a crimp tool kit and a complete PEX system are not the same thing. Check the box contents and make a list before checkout.

For one or two connections, push-to-connect is usually faster: no tool, no rings, just insert and pull. For ten or more, crimp can save cost per fitting. Another consideration: crimp connections are lower profile. If you're running PEX through a tight crawlspace, a row of push fittings gets bulky. Bottom line: choose the system based on the total job, not the excitement of a new tool.

What's the gotcha with a SharkBite 90 degree female elbow push fitting?

The thread side is where I screwed up. In September 2022, I installed one on a toilet supply line. I wrapped pipe tape, threaded a brass nipple, and then kept tightening to stop a small weep. The elbow cracked near the female threads.

What I learned: the push-in side needs to go onto fully deburred PEX or copper, and the threaded side needs to be snug, not torqued like a pipe wrench. Supporting the body of the fitting with a second wrench helps. Also, don't assume the female elbow only comes in one size. Verify the thread size before ordering. (Mental note: check the depth mark before pushing, then pull to confirm.) A SharkBite 90 degree female elbow push fitting can handle pressure, but installation technique matters more than the price tag.

Press brass ball valve inline 77VLF or a SharkBite push-fit ball valve?

I can't tell you what to install without seeing your system. What I can tell you is the cost math. In Q1 2024, I quoted both options for a main shutoff replacement. The press brass ball valve inline 77VLF is a solid piece of hardware, but it needs a press tool and the correct jaws for the tubing material. If you don't already own that tool, the rental and time eat your savings. We found that out when the rental shop asked, 'Which jaws?'

A SharkBite push-fit ball valve costs more as a component, but if you're already working with push-fit, you skip the press tool entirely. If you press pipe all day, the press valve is probably the right call. I'm not against press methods. I'm against buying a tool for one job without calculating the total cost.

Can I rent a welding machine instead of soldering or pressing?

You can, but the rental price is only the beginning. The machine near me was $85 per day in March 2023 (verify current rates). Add gas, filler rod, gloves, a brush, and the time to set up. Many shops also require a gas cylinder deposit, which adds another $150 to the cash you need upfront. I learned the hard way that a rental doesn't include skill. My first attempt at a copper joint looked like a stack of pancakes.

I ended up calling a plumber, paying $275, and the rental was still due the next morning. If you already weld, renting is fine. If you've never welded, the cheapest option is often hiring the person who already owns the machine. That's not a popular opinion, but it's the math.

What does a pruning shears review have to do with any of this?

Funny story. When I searched for 'pruning shears review,' it was because a forum thread claimed you could cut PEX with pruning shears. Don't. Pruning shears crush soft PEX before they cut it, leaving an oval end that leaks. The pruning shears review search ended up teaching me something broader.

Before trusting any review, ask who wrote it. Per FTC guidelines (ftc.gov), reviews and endorsements must disclose material connections. An anonymous 'great product' review is worth less than a detailed one showing the tool after 200 cuts. Same logic applies to plumbing tool reviews. Read the negative reviews. The one-star complaints usually contain the truth.

Why does my PEX crimp leak even though the kit looked complete?

Usually because the ring was not positioned over the barb, or the tool was not closed completely. In 2020, I made twelve connections with a new crimp tool and used a go/no-go gauge after every one. Two still leaked because I skipped the insertion depth check. The gauge checks the crimp, not whether the tubing bottomed out in the fitting.

Here's the thing: the O-rings inside the fitting need the tubing to reach the internal shoulder. If you only check the outside of the ring, you can crimp a masterpiece onto nothing. My current checklist is: cut square, deburr, mark depth, insert to the mark, crimp, gauge, and do a gentle pull test. It sounds tedious until a leak costs you a ceiling.

Which matters more: code compliance or price?

Code compliance, by a mile. A $30 fitting that fails inspection costs $100 in rework plus a day of schedule. In 2017, I ordered the cheapest push-to-connect fittings I could find. They looked identical to the name-brand ones. They were not listed to a recognized standard like ASSE 1061 or NSF 61. The inspector flagged them, and I paid a plumber to replace eight fittings. Total wasted: $890.

My rule now: for potable water, buy fittings certified to a recognized standard (the cert mark is usually etched on the fitting), and verify local code acceptance before buying. Code compliance isn't just about inspection. It's about liability if something goes wrong. A cheap fitting in a wall is a failure you're just scheduling. I'm not saying the most expensive option is always right. I'm saying the cheapest option needs proof, not just a low price.