Best Socket Set for Plumbers: Deep 6-Point Picks for Tight, Wet Spaces

A deep 6-point set in 3/8-inch drive is the closest thing to a default answer for plumbing. Angle stop nuts, faucet shank nuts, tub and shower valve fasteners and toilet closet bolts are usually recessed on a stud or a length of threaded shank, and a standard-depth socket simply bottoms out before it reaches the nut. TEKTON builds its deep sets so the whole range is deep, which is the main reason to choose it over a mixed mechanics kit where only a handful of deep sockets are included.

The 6-point profile is the other half of the argument. Plumbing fasteners are frequently brass or plated pot metal, and a 12-point socket loads the corners of the nut instead of the flats, which is how soft nuts get rounded. The size markings are worth calling out too, because most of this work happens in a dim cabinet where stamped-only markings are unreadable.

This is a SHOCKWAVE Impact Duty set, not a chrome hand-tool set, and that distinction is the whole point of it. Impact sockets are forged thicker and heat treated to absorb the hammering action of an impact wrench instead of cracking, and Milwaukee finishes them in black phosphate rather than bright chrome. Phosphate is the finish you want in a service van and under a sink, because chrome plating chips and then rusts from the edge inward.

For plumbing this is the set you reach for when a fastener is not moving: an old water heater nut, a rusted strap bolt, a seized fitting on a hose bib. What it is not is a general access set. The sockets are standard depth and the sizes are SAE only, and the extra wall thickness means it will not slide into a space that a thin-wall chrome socket clears. Treat it as the muscle alongside a deep 6-point set, not instead of one.

GEARWRENCH sits a step above budget sets on machining tolerance, and on brass that matters more than it does on steel. A socket that fits loosely lets the nut move inside the opening before it grips, and on a soft compression nut that first bit of slop is what starts the rounding. The deep 6-point version of this set is the one to look at for plumbing.

The polished chrome finish is easy to clean, which is a real advantage when your sockets pick up pipe dope, flux and plumber grease. The trade-off against the Milwaukee pick is corrosion: polished chrome looks better and cleans easier, phosphate survives neglect better.

CRAFTSMAN is the sensible value option because availability is genuinely useful. Sockets get lost down drain openings and left in crawl spaces, and being able to replace a single size locally is worth something. The 6-point sets cover both SAE and metric in most versions, which matters because imported faucet cartridges and modern fittings are not always SAE.

The one thing to verify before you buy is depth. A lot of CRAFTSMAN 3/8-inch drive sets are standard-depth sockets with only a few deep ones, and for plumbing you want the deep version or a separate deep set alongside it. Read the listing rather than assuming.

This is the pick for someone who does not already own a socket set at all and wants one purchase to cover general work as well as plumbing. The 1/4-inch drive is genuinely useful on small fasteners around faucet handles and appliance connections, where a 3/8-inch ratchet head is too big to swing, and the included extensions matter more than most people expect when you are working behind a basin.

The catch is the same one that applies to every general mechanics kit: it is built around standard-depth sockets. It will not reach a recessed faucet shank nut, and no amount of extensions fixes that. Buy it for breadth, then add a deep 6-point set for the plumbing-specific jobs.