Tank Drains | McMaster-Carr

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System of Measurement

Pipe Size

Material

Inlet Pipe Size

For Use With

Acetic Acid (White Vinegar) (10% Concentration)

Hydrochloric Acid (25% Concentration)

Inert Gas

Nitric Acid (10% Concentration)

Oil

Phosphoric Acid

Phosphoric Acid (85% Concentration)

Sodium Hydroxide (Caustic Soda) (50% Concentration)

Thread Type

Fitting Connection

Handle Style

Shape

Gender

Fitting Type

Maximum Pressure @ Temperature

Voltage

Outlet Pipe Size

Hole Diameter

For Tank Surface

Tank Connection Method

Connects To

Pipe Material

Maximum Pressure

REACH

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Yes

RoHS

Compliant

Compliant with Exemptions

Not Compliant

Export Control Classification Number (ECCN)

2B999

EAR99

DFARS Specialty Metals

Exempt

Outlet Connection Port

404 Products

Drain Valves

Discharge liquids from most tanks

28 products

Timer-Actuated Compressed Air Drain Valves

Automatically open valves at set intervals with the electronic timer

17 products

High-Pressure Timer-Actuated Compressed Air Drain Valves

Withstand at least twice the pressure of our other timer-actuated valves

12 products

High-Pressure Float-Actuated Compressed Air Drain Valves

Withstand the highest pressure of all our float-operated drain valves

1 product

Timer-Actuated Compressed Air Drain Valves with Digital Display

Set and view precise intervals on the display to automatically open valves

7 products

Energy-Saving Compressed Air Drain Valves

Open when full and close just before empty to avoid loss of compressed air

5 products

Easy-Clean Float-Actuated Compressed Air Drain Valves

A float automatically opens the external drain when the bowl starts to fill

1 product

Compact Float-Actuated Compressed Air Drain Valves

Shorter than our other float-operated valves for tight spots

2 products

High-Temperature Drain Valves

Release fluid from tanks in boiler rooms or heat transfer systems

8 products

Drain Valves for Thick Liquids

Empty mud, sludge, and water from tanks, reservoirs, and basins

5 products

Back-Pressure-Actuated Compressed Air Drain Valves

Automatically open valves with back pressure from turning off compressors

4 products

Clear-View Float-Actuated Compressed Air Drain Valves

A clear bowl makes it easy to see condensate that’s forming in your line

5 products

High-Discharge Float-Actuated Compressed Air Drain Valves

Best for large compressed air systems, these handle high rates of discharge

2 products

Other Products

Pipe Straights

Join lengths of pipe to send contents in one direction

244 products

Hose Drainers

No need to bend over and shake out fluid from your hose—let gravity do the work

1 product

Pipe Bushings

Connect two pipes of different diameters

21 products

Pipe Unions

Separate into three pieces so you can access your line without unthreading pipe connections

10 products