Every few weeks, I get a message that starts with 'what should I buy?' from a field supervisor or a new customer. My honest answer is: I don't know until I see the job. I'm a procurement manager, not a plumber or tool engineer. But I've been buying this stuff for 7 years at a 40-person mechanical contracting company, and I manage about $420K a year in materials and tooling spend. So I have opinions—and spreadsheets.
Here is a practical FAQ based on questions that show up in our inbox and in our search data. It covers the Watts water pressure reducing valve, a sump pump wattage question, and a few tools that appear on our purchase orders. If you are comparing total cost instead of just price, this is the right place.
What is a Watts water pressure reducing valve?
A Watts water pressure reducing valve (PRV) lowers incoming water pressure so pipes and fixtures are not subjected to pressure above the set point. If the main line arrives at 90 psi and the facility runs at 60 psi, the PRV handles that adjustment.
Watts is a common manufacturer in this category, and that is part of why I buy it. I can get repair kits without hunting around. According to Watts product literature for the 25AUB series, outlet pressure is adjustable, typically around 25-75 psi on the models I have ordered. The exact range depends on pipe size and model, so I verify before I issue a purchase order. I am not a plumbing engineer, so I don't make up specs.
When budgeting, the valve itself is only one line item. In Q2 2024 I reviewed three quotes for a commercial water heater replacement. The PRV was about 6% of the total material cost. The other fittings, gauges, and labor were the real cost.
How many watts is a sump pump?
This question appears in our search data all the time, probably because people are trying to size a generator or confirm a breaker. It also creates a fun mix-up: 'Watts' is a valve brand, and 'watts' is a unit of electrical power. They are not the same.
I'm not an electrician, so I won't quote exact electrical values from memory. What I can tell you from a procurement standpoint is that every pump has a nameplate. Look for the running watts, starting watts, and full-load amps. In our fleet, a 1/3 HP pump often draws around 800-1,000 running watts and spikes higher at startup. A 1/2 HP pump tends to run around 1,200-1,500 watts and surge even more. Those are common figures from our orders, not universal truth.
If you compare pumps, compare the startup requirement to the generator or circuit rating. That is the number that gets missed on the first quote.
Should I buy a 3/8 air ratchet?
A 3/8 air ratchet is useful when techs need to reach fasteners in tight spots, like around a water heater or behind a valve assembly. I have placed enough POs for these to know it is also easy to overspend on the tool and ignore the air supply.
When I search vendor catalogs for an air ratchet 3/8, the spec sheet usually lists air consumption around 3-5 CFM at 90 psi. If your compressor can't keep up, the ratchet runs weak. I went back and forth between air and battery ratchets for two months. Air won for our shop because every truck already has a compressor. If your crew is all battery and works in buildings without compressors, the opposite call makes sense.
That is not a product endorsement. It's total cost of ownership.
Do I need a 10,000 psi hydraulic pump?
Probably not for standard water-side valve work. A 10,000 psi hydraulic pump is a specialized unit for hydraulic rams, crimping heads, flange spreaders, or test equipment that specifically requires that pressure class. It is not an upgrade option when you want extra power.
Before you buy, check the rated pressure on the tool you plan to power. If the tool says 10,000 psi, match the pump. If the tool says 2,000 psi, a 10,000 psi pump is likely the wrong choice unless you configure the relief correctly. That question belongs to a hydraulic specialist, not a procurement manager.
For rough budget context, I received quotes in January 2025 from two industrial suppliers. A basic 10,000 psi manual pump kit came in around $800-$1,500. A powered unit ran $1,500-$2,800. Verify current pricing. Honestly, rent one first for a one-off job.
How do you assemble a hole saw?
It is not a silly question. Different arbor designs exist, but the common sequence for a two-piece arbor is:
- Push the pilot bit through the center hole of the hole saw, point first through the teeth side.
- Thread the arbor onto the back of the hole saw.
- Align the drive pins or flats with the slots in the hole saw.
- Tighten the set screw with the included hex key.
Some quick-change arbors use a quarter-turn collar instead of a set screw. Check the instructions that came with the set. From a cost viewpoint, the biggest risk is not spending one extra minute on assembly. It's losing the pilot bit or mixing two arbors. Keep each arbor with its pilot bit in a labeled organizer.
What does a Watts PRV actually cost to install?
The hidden cost is installed cost. A Watts water pressure reducing valve install may involve shutting off the water, cutting pipe, adding service valves, mounting a pressure gauge, and setting the outlet pressure while the system runs. None of that is in the valve's list price.
When I compare vendor proposals, I ask them to itemize all fittings and accessories. In another 2024 quote, one vendor looked lower until we added the valve accessories and freight. The total flipped by about 12% in favor of the vendor who had itemized everything. That is typical in this category.
Also, do not treat a PRV as a no-maintenance part. Keep a repair kit in stock and check the outlet pressure once a year. That is not a sales pitch. It is the kind of operating cost that prevents a bigger invoice.