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Saddle Valve
(Also known as a “tap-a-line” valve)
A saddle valve is a compact plumbing device designed to create a secondary outlet from an existing tubing line or pipe—typically for supplying water to appliances such as ice makers, humidifiers, or reverse osmosis systems.
Description:
- It is named for the way it “saddles” the pipe, clamping onto it like a saddle on a horse.
- The valve is usually attached to a copper, PVC, or steel pipe via a clamp or silver brazing.
- A sharp piercing needle or spike is integrated into the valve mechanism. When the handle is turned, the spike punctures the pipe wall, creating a small opening that allows fluid (often water) to flow into the new outlet.
- In some models, a hole must be drilled prior to installation rather than using the piercing spike.
Key Features:
- Simple and low-cost installation, requiring no pipe cutting or soldering.
- Common in DIY home plumbing projects.
- Typically used with low-pressure systems and small-diameter tubing (e.g., 1/4″ supply lines).
- Not recommended for high-demand or permanent applications, as it may leak or clog over time.
Typical Applications:
- Supplying water to:
- Refrigerator ice makers
- Evaporative coolers
- Undersink filtration systems
- Aquarium water systems
Note:
Many building codes now discourage or prohibit the use of saddle valves in favor of more durable alternatives like tee fittings with shut-off valves, due to potential long-term reliability issues.
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