Source: Title: Valve Under the Sink Won’t Shut Off? What Happens Next Content revision: 5742b5e16cc22b77612ebfbde30e65aaf02bb87ce70f76731b2efddb79271749 Source modified (WordPress record): 2026-09-10T12:27:17+00:00 Extracted at: 2026-10-25T18:35:40+00:00 Freshness: Stored anonymous publication. Refreshed in the background after content changes and daily; the previous successful version remains available during refresh. See extracted-at time. Live inventory requires its tool. ## Relevant next steps This page has no currently verified direct booking-service mapping. Choose an actual service or ask the office; do not infer a service ID from the page title. - [Choose a booking service and check coverage](https://mtnmanplumbing.com/?agentnet=task&agentnet_tool=get_booking_services&agentnet_display=raw) — get_booking_services - [Ask the office about this page](https://mtnmanplumbing.com/?agentnet=task&agentnet_tool=submit_contact&agentnet_display=raw) — submit_contact; needs: request_id, name, message, user_confirmed ## On this page - [Which valveneeds help?]() - [Sink valves]() - [Toilet valve]() - [Dishwasher & refrigerator]() - [Laundry valves]() - [Multi-turn or quarter-turn?]() - [Angle stop or straight stop?]() - [Common questions.]() - [Do I need the whole house shut off to replace a toilet stop?]() - [Do both valves under a sink need replacing?]() - [Sources & public guide record]() - [What does theprice cover?]() - [Pressure changes across the valley.]() - [Keep following the plumbing.]() - [Want to look at it first?]() - [Find your main shutoff before you need it. The valve in the yard probably isn't it.]() [← Shutoff valve service hub]() Sandy, Utah · Salt Lake Valley One fixture at a time # Sink, Toilet & Appliance Shutoff Valves Find the small valve feeding your fixture, understand why it leaks or stops working, and see what goes into repair or replacement. Long story short We replace leaking, seized and worn shutoff valves under sinks and beside toilets. We can also add an accessible shutoff when the plumbing needs one. Tell us which fixture it serves and whether you can currently turn off the water. Jump to: [Which valve needs help]() · [Common questions]() · [Want to look at it first]() Skip the read? [Book a visit]() or [text (385) 766-8935](). - [All shutoff services]() - [Sink, toilet & appliance valves]() - [Main water shutoffs]() - [Automatic leak shutoffs]() Find your fixture ## Which valve needs help? A fixture stop is the small valve feeding a faucet, toilet or appliance. We repair and replace stops that leak, seize up or keep letting water through when closed. ![Two chrome fixture shutoff valves on the wall under a bathroom sink, connected to braided faucet supply hoses]() Our work / Salt Lake City **Two small valves. One faucet.** The chrome handles at the back of this cabinet control the faucet’s hot and cold supplies. ### Sink valves ### Two supplies under the cabinet The small valves where the hot and cold pipes enter the cabinet are called fixture stops. Short supply hoses connect them to the faucet. Close both stops for faucet replacement. For a leak at one supply hose, its own stop controls that side. A stop that drips around the handle after turning needs attention. If water continues from the faucet after the line drains, one of the stops may be failing to seal. ### Toilet valve ### One valve behind the toilet The toilet stop feeds cold water through a hose to the tank’s fill valve. It is commonly low on the wall beside the toilet, or on a pipe coming through the floor. It needs to work before a toilet, fill valve or supply hose can be serviced. Once the stop is closed, flushing uses the water stored in the tank. A tank that keeps refilling shows that water is still getting past the stop. A continuing running-toilet problem with the supply open usually starts with the tank’s internal parts. ### Dishwasher & refrigerator ### Follow the small supply hose A dishwasher commonly uses a hot-water stop under the kitchen sink. It may have its own valve or share a dual-outlet valve with the faucet. A refrigerator’s ice maker and water dispenser use a small cold-water line with a shutoff under the sink or behind the refrigerator. On a dual-outlet stop, one handle may shut both outlets together; a two-handle version can control each separately. We trace the hoses so the valve being serviced matches the appliance. ### Laundry valves ### Hot and cold at the washer box Washing machines usually have two hose connections, supplied by separate hot and cold valves or a combined shutoff. Those valves get used when hoses or the machine are changed—often after sitting open for years. We check for leaks at the handles, hose threads and pipe connections inside the box. A worn hose washer can leak at the hose connection even when the shutoff itself is sound. ### Multi-turn or quarter-turn? A multi-turn stop tightens a rubber washer against an internal seat as you turn the handle. Aging washers can harden, break apart or stop sealing. A quarter-turn replacement operates with a short rotation and is easy to use in a tight cabinet. The internal design depends on the product; BrassCraft’s G2, for example, uses a one-piece shutoff mechanism. [Link to this answer]() ### Angle stop or straight stop? An angle stop turns the water path 90 degrees, usually from a wall pipe toward the fixture. A straight stop keeps the connections in line and often fits a pipe rising from the floor. We choose the shape that leaves the handle reachable and lets the hose curve naturally without a kink. [Link to this answer]() ### The connection at the wall matters The short piece of pipe sticking out of the wall is the stub-out. A compression stop seals around copper with a metal ring called a ferrule; other stops attach with solder, threads, press fittings or a matching PEX connection. A damaged ferrule, short stub-out or corroded pipe can require work behind the old valve. ### The valve and supply hose work together We check the hose’s end seals, length and condition when replacing a stop. Older one-piece valve-and-hose assemblies are replaced together. A separate valve and replaceable connector make future faucet or toilet service easier. A cracked valve body, seized stem or damaged connection calls for replacement. Read more: [BrassCraft: quarter-turn fixture stops and connection types ↗]() · [BrassCraft: multi-turn stops and repair-part resources ↗]() ### Can the little valve be rebuilt? Some multi-turn stops can be repaired with a matching stem, washer and packing kit when the body and seat are sound. For a worn or unreliable stop, we usually discuss a new quarter-turn valve. Before removing either the internals or the valve, we shut off the supply ahead of it and relieve pressure. Afterward, we check for leaks with the water back on, close the stop to confirm it holds, then reopen it and check the fixture’s flow. When both sink valves are the same age, we check the pair during the same visit. [Book fixture shutoff repair ↗]() ### See our washer-box shutoff installation Our work / South Jordan ### Hot and cold. Both within reach. This washer box has separate hot and cold quarter-turn shutoffs. The handles and hose outlets face into the box, with copper supply connections above. [Explore laundry & appliance plumbing →]() ![Hot and cold quarter-turn washer shutoffs in a recessed laundry box with copper press connections]() Two supplies / Two shutoffs **The small valve won’t stop the water?** The house main is the next shutoff upstream. We need a working shutdown before replacing the fixture valve. [Find the main and outside backup →]() A few useful answers ## Common questions. ### Do I need the whole house shut off to replace a toilet stop? Replacing the toilet’s shutoff valve requires a working valve ahead of it, usually the house main. Once the new toilet stop is installed and tested, it can isolate future toilet or hose repairs by itself. [Link to this answer]() ### Do both valves under a sink need replacing? We check both. When they are the same age and both are stiff, leaking or unreliable, replacing the pair can save a second shutdown. A sound valve can stay when the problem is confined to the other side. [Link to this answer]() ### Sources & public guide record Maintained by Mountain Man Plumbing · Utah Master Plumber, Lic. \#12992295-5501. 1. [BrassCraft: quarter-turn fixture stops and connection types ↗]() 2. [BrassCraft: multi-turn stops and repair-part resources ↗]() Guide version 2026.09.10.1 · References checked 2026-09-10. - [Public guide record · JSON]() - [Read as Markdown]() ## Need a dependable shutoff? Tell us which valve needs help. We’ll explain the work and price before starting. [Book valve service ↗]() The price, in plain terms ## What does the price cover? 1. 01 **Name the work.** What's being repaired or installed, and what stays. 2. 02 **Check what's included.** Parts, labor, access, cleanup and any required permit. 3. 03 **Settle the open questions.** Extra work, exclusions and the warranty for this job. A quote for shutoff valve work should make the scope clear. Check who handles access and patching, whether any further diagnosis costs extra, and what happens if opening things up reveals more damage. **Found a lower number? Ask us why ours is different.** Bring both descriptions of the work. Compare the equipment, repair scope and exclusions before deciding what the difference buys. A higher price alone doesn't prove a better job. - [**What valve and pipe repairs cost in Utah ↗** What changes the cost and what to ask before agreeing. On Utah Plumbing Prices, which we publish.]() - [**Already have a quote? Check it ↗** Use our second-opinion tool to work through the job and the price you've been given.]() - [**How plumbing pricing works ↗** Flat rate, hourly, dispatch fees, permits: what each one means for what you pay.]() From our local guides ## Pressure changes across the valley. Read the local pressure-zone and reservoir research, then see how a home’s pressure regulator works. - [**Herriman: ten pressure zones ↗**]() - [**Draper: moving water up to SunCrest ↗**]() - [**West Jordan: city pressure and house pressure ↗**]() - [Find plumbing help in your city ↗]() - [Explore this topic across our service area ↗]() Connected in your home ## Keep following the plumbing. - [01 **Water shutoff valves →** Find the upstream main if a small fixture valve will not close.]() - [02 **Faucet & sink repair →** Plan the faucet and supply hose work served by these valves.]() - [03 **Bidet seat installation →** Adding a bidet seat adds another connection at the toilet supply.]() MOUNTAIN MAN PLUMBING / DIY ## Want to look at it first? [All DIY tips ↗]() Find your main shutoff before you need it. The valve in the yard probably isn't it. DIY TIP / 01 Shutoff Valves ### [Find your main shutoff before you need it. The valve in the yard probably isn't it.]() Along the Wasatch Front the capped valve in your lawn is almost always the sprinkler shutoff, not the house shutoff. And the real one has a habit of leaking the first time it's turned in twenty years. Read the tip ↗ ## Approved image details - — Bathroom Faucet Replacement Salt Lake City by Mountain Man Plumbing Source page: - — New laundry box with quarter-turn valves and ProPress copper connections in South Jordan, Utah Source page: --- [Content index](https://mtnmanplumbing.com/?agentnet=index) · [JSON and conversion details](https://mtnmanplumbing.com/services/shutoff-valves/fixture-shutoff-valves/?agentnet=json)