Condensate Drain Valves | McMaster-Carr

	Voltage Voltage

120V AC

240V AC

24V DC

	Inlet Pipe Size Inlet Pipe Size

	Outlet Pipe Size Outlet Pipe Size

	Maximum Pressure Maximum Pressure

	Electrical Connection Type Electrical Connection Type

Plug

Hardwire

	Actuation Actuation

	Drain Time Drain Time

	Environment Environment

	Outlet Connection Type Outlet Connection Type


Pipe	Tube

	Environmental Rating Environmental Rating

	Cord Length Cord Length

6 ft.

8 ft.

	Discharge Capacity Discharge Capacity

	Housing Material Housing Material

	Drain Location Drain Location

Internal

External

	Maximum Cycle Interval Time Maximum Cycle Interval Time

	Specifications Met Specifications Met

CE Marked

DIN

	Power Source Power Source

Electric

Air

	Maximum Temperature Maximum Temperature

	Outlet Gender Outlet Gender

Female

Male

	Overall Height Overall Height

	Overall Depth Overall Depth

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

RoHS Compliant with
Exemptions

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

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50 Products

About Air Preparation

NEMA 4 Enclosure

NEMA 4X Enclosure

NEMA 1 Enclosure

Set the electronic timer on these drain valves to open automatically at your specified time interval. They’re excellent for compressed air systems with high oil content because they resist clogging when water, oil, and sediment combine to form sludge. Install drain valves after separators, dryers, filters, and aftercoolers to collect and remove water from your air line.

Drain valves that meet NEMA 4 are rated for protection from dirt and washdowns. Drain valves that meet NEMA 4X are rated for protection from dirt, washdowns, and corrosion.

Install optional strainers before drain valves to prevent damage from debris in your pipeline.

For technical drawings and 3-D models, click on a part number.

Drain Valves
Inlet			Outlet					Overall								Optional Strainers
Pipe Size	Thread Type	Gender	Pipe Size	Thread Type	Gender	Discharge Cap., gpm	Max. Pressure, psi	Ht.	Wd.	Dp.	Cycle Interval	Drain Time	Max. Temp., °F		Each		Each
Brass Housing—IP65, NEMA 4 Enclosure
Electric Powered, 24V DC—Hardwire
1/4	NPT	Female	1/4	NPT	Female	4.5	230	4 1/2"	2"	3 1/2"	1-45 min.	0.5-10 sec.	130°	0000000	0000000	0000000	000000
3/8	NPT	Female	3/8	NPT	Female	1.2	230	4 1/2"	2"	3 1/2"	1-45 min.	0.5-10 sec.	130°	0000000	000000	0000000	00000
1/2	NPT	Female	1/2	NPT	Female	4.5	230	4 1/2"	2"	3 1/2"	1-45 min.	0.5-10 sec.	130°	0000000	000000	0000000	00000
Electric Powered, 120V AC—Three-Prong Plug
1/4	NPT	Female	1/4	NPT	Female	4.8	230	4 1/4"	1 3/4"	3 1/2"	1-45 min.	0.5-10 sec.	130°	0000000	000000	0000000	00000
1/4	NPT	Female	1/4	NPT	Female	15	300	4 5/8"	2 1/2"	3 5/8"	1-45 min.	0.5-10 sec.	130°	0000000	000000	0000000	00000
3/8	NPT	Female	3/8	NPT	Female	7	230	4 1/4"	1 3/4"	3 1/2"	1-45 min.	0.5-10 sec.	130°	0000000	000000	0000000	00000
3/8	NPT	Female	3/8	NPT	Female	19	300	4 5/8"	2 1/2"	3 5/8"	1-45 min.	0.5-10 sec.	130°	0000000	000000	0000000	00000
1/2	NPT	Female	1/2	NPT	Female	7	230	4 1/4"	1 3/4"	3 1/2"	1-45 min.	0.5-10 sec.	130°	0000000	000000	0000000	00000
1/2	NPT	Female	1/2	NPT	Female	15	300	4 5/8"	2 1/2"	3 5/8"	1-45 min.	0.5-10 sec.	130°	0000000	000000	0000000	00000
Brass Housing—NEMA 1 Enclosure
Electric Powered, 120V AC—Three-Prong Plug
1/4	NPT	Female	1/4	NPT	Female	1.2	200	3 1/4"	4"	4 1/4"	1-60 min.	1-30 sec.	120°	0000000	000000	0000000	00000
Brass Housing—NEMA 4X Enclosure
Electric Powered, 120V AC—Three-Prong Plug
1/4	NPT	Female	1/4	NPT	Female	2.9	200	4 1/8"	6"	3 3/4"	0-50 min.	1-15 sec.	180°	0000000	000000	0000000	00000
1/2	NPT	Female	1/2	NPT	Female	6	300	4"	6"	3 3/4"	0-50 min.	1-15 sec.	180°	00000000	000000	0000000	00000
Electric Powered, 240V AC—Hardwire
1/4	NPT	Female	1/4	NPT	Female	2.9	200	4 1/8"	6"	3 3/4"	0-50 min.	1-15 sec.	180°	0000000	000000	0000000	00000

Replacement Filter Screens for Optional Strainers

0000000

Each

00000

Timer-Operated Compressed Air Drain Valves with Digital Display

Use the digital display to set these valves to open automatically at precise intervals. They’re excellent for compressed air systems with high oil content because they resist clogging when water, oil, and sediment combine to form sludge. Install drain valves after separators, dryers, filters, and aftercoolers to collect and remove water from your air line. They meet NEMA 4 for protection from dirt and washdowns.

Install optional strainers before drain valves to prevent damage from debris in your pipeline.

For technical drawings and 3-D models, click on a part number.

Drain Valves
Inlet			Outlet					Overall									Optional Strainers
Pipe Size	Thread Type	Gender	Pipe Size	Thread Type	Gender	Discharge Cap., gpm	Max. Pressure, psi	Ht.	Wd.	Dp.	Cycle Interval	Drain Time	Display Type	Max. Temp., °F		Each		Each
Brass Housing with LED Display—IP65, NEMA 4 Enclosure
Electric Powered, 120V AC—Three-Prong Plug
1/4	NPT	Female	1/4	NPT	Female	7	230	3 3/4"	1 3/4"	3 1/2"	0-99 hrs.	0-99 hrs.	LED	130°	000000	0000000	0000000	000000
3/8	NPT	Female	3/8	NPT	Female	7	230	3 3/4"	1 3/4"	3 1/2"	0-99 hrs.	0-99 hrs.	LED	130°	000000	000000	0000000	00000
1/2	NPT	Female	1/2	NPT	Female	7	230	3 3/4"	1 3/4"	3 1/2"	0-99 hrs.	0-99 hrs.	LED	130°	000000	000000	0000000	00000

Replacement Filter Screens for Optional Strainers

0000000

Each

00000

High-Pressure Timer-Operated Compressed Air Drain Valves

Brass Housing, 1,200 psi Max. Pressure

Brass Housing, 600 psi Max. Pressure

Bronze Housing and Stainless Steel Housing

These withstand at least double the pressure of our other timer-operated drain valves. Set the electronic timer to open automatically at your specified time interval. These drain valves are excellent for compressed air systems with high oil content because they resist clogging when water, oil, and sediment combine to form sludge. Install drain valves after separators, dryers, filters, and aftercoolers to collect and remove water from your air line.

Drain valves that meet NEMA 4 are rated for protection from dirt and washdowns. Drain valves that meet NEMA 4X are rated for protection from dirt, washdowns, and corrosion.

Install optional strainers before drain valves to prevent damage from debris in your pipeline.

For technical drawings and 3-D models, click on a part number.

Drain Valves
Inlet			Outlet					Overall								Optional Strainers
Pipe Size	Thread Type	Gender	Pipe Size	Thread Type	Gender	Discharge Cap., gpm	Max. Pressure, psi	Ht.	Wd.	Dp.	Cycle Interval	Drain Time	Max. Temp., °F		Each		Each
Brass Housing—IP65, NEMA 4 Enclosure
Electric Powered, 120V AC—Three-Prong Plug
1/4	NPT	Female	1/4	NPT	Female	3	1,200	4 1/2"	2"	3 3/8"	1-45 min.	0.5-10 sec.	130°	0000000	0000000	000000	00
3/8	NPT	Female	3/8	NPT	Female	4	1,200	4 1/2"	2"	3 3/4"	1-45 min.	0.5-10 sec.	130°	0000000	000000	000000	00
1/2	NPT	Female	1/2	NPT	Female	3	1,200	4 1/2"	2"	3 3/8"	1-45 min.	0.5-10 sec.	130°	0000000	000000	000000	00
1/2	NPT	Female	1/2	NPT	Female	18	600	6"	6 3/8"	3"	1-24 hrs.	1-15 min.	140°	00000000	000000	000000	00
Bronze Housing—NEMA 4X Enclosure
Electric Powered, 120V AC—Three-Prong Plug
1/2	NPT	Female	1/2	NPT	Female	1.25	600	7"	7 5/8"	4"	1-50 min.	5 sec.	180°	00000000	000000	0000000	000000
3/4	NPT	Female	3/4	NPT	Female	2.5	600	7 1/2"	7 5/8"	4"	1-50 min.	5 sec.	180°	00000000	000000	000000	00
1	NPT	Female	1	NPT	Female	4.3	600	7 3/4"	7 5/8"	4"	1-50 min.	5 sec.	180°	00000000	000000	000000	00
316 Stainless Steel Housing—NEMA 4X Enclosure
Electric Powered, 120V AC—Three-Prong Plug
1/2	NPT	Female	1/2	NPT	Female	1.25	2,000	7"	7 5/8"	4"	1-50 min.	5 sec.	180°	00000000	000000	000000	00
3/4	NPT	Female	3/4	NPT	Female	2.5	600	7 1/2"	7 5/8"	4"	1-50 min.	5 sec.	180°	00000000	000000	000000	00
1	NPT	Female	1	NPT	Female	4.3	600	7 3/4"	7 5/8"	4"	1-50 min.	5 sec.	180°	00000000	000000	000000	00

Replacement Filter Screens for Optional Strainers

0000000

Each

00000

Easy-to-Clean Float-Operated Compressed Air Drain Valves

An external drain provides quick, easy access for cleaning. Also known as drip legs, these drain valves have a float that automatically opens the drain when the bowl begins to fill. Install them at low points in your line after separators, dryers, filters, and aftercoolers. Drains can be serviced without removing them from your air line.

For technical drawings and 3-D models, click on a part number.

Inlet			Outlet					Overall
Pipe Size	Thread Type	Gender	Pipe Size	Thread Type	Gender	Discharge Cap.	Max. Pressure, psi	Ht.	Wd.	Dp.	Drain Material	Max. Temp., °F		Each
Polycarbonate Bowl—Opaque
1/2	NPT	Female	1/4	NPT	Female	Not Rated	150	7 3/4"	3 3/4"	3 3/4"	Bronze	120°	0000000	0000000

Compact Float-Operated Compressed Air Drain Valves

Sized right for tight spots. Also known as drip legs, these drain valves have a float that automatically opens the drain when the bowl begins to fill. Install them at low points in your line after separators, dryers, filters, and aftercoolers. Drains can be serviced without removing them from your air line.

For technical drawings and 3-D models, click on a part number.

Inlet			Outlet					Overall
Pipe Size	Thread Type	Gender	Pipe Size	Thread Type	Gender	Discharge Cap., gpm	Max. Pressure, psi	Ht.	Wd.	Dp.	Max. Temp., °F		Each
Aluminum Bowl—Opaque
1/4	NPT	Female	1/8	NPT	Female	0.7	250	3 1/4"	2 1/2"	2 1/2"	175°	00000000	0000000
1/2	NPT	Female	1/8	NPT	Female	0.7	250	3 1/4"	2 1/2"	2 1/2"	175°	00000000	000000

Easy-to-Monitor Float-Operated Compressed Air Drain Valves

With Polycarbonate Bowl

With Nylon Bowl

Keep an eye on condensate collecting in your compressed air line. These drain valves have a clear bowl, so you can see inside to inspect the contents. Also known as drip legs, these have a float that automatically opens the drain when the bowl begins to fill. Install them at low points in your line after separators, dryers, filters, and aftercoolers. Drains can be serviced without removing them from your air line.

For technical drawings and 3-D models, click on a part number.

Drain Valves
Inlet			Outlet							Overall						Replacement Bowls
Pipe Size	Thread Type	Gender	Connection Type	For Tube ID	Pipe Size	Thread Type	Gender	Discharge Cap., gpm	Max. Pressure, psi	Ht.	Wd.	Dp.	Max. Temp., °F		Each		Each
Polycarbonate Bowl—Clear
1/4	NPT	Female	Threaded	__	3/8	NPT	Female	Not Rated	145	7 1/8"	3 1/8"	3 1/8"	140°	0000000	000000	0000000	000000
3/8	NPT	Female	Threaded	__	3/8	NPT	Female	Not Rated	145	7 1/8"	3 1/8"	3 1/8"	140°	0000000	00000	0000000	00000
Nylon Bowl—Clear
1/2	NPT	Female	Barbed	6 mm	__	__	Male	1.2	145	6 5/8"	2 3/8"	2 3/8"	122°	0000000	000000	0000000	00000

High-Discharge Float-Operated Compressed Air Drain Valves

With a discharge capacity of more than four gallons per minute, these drain valves can handle large compressed air systems. Also known as drip legs, these drain valves have a float that automatically opens the drain when the bowl begins to fill. Install them at low points in your line after separators, dryers, filters, and aftercoolers. Drains can be serviced without removing them from your air line.

For technical drawings and 3-D models, click on a part number.

Inlet			Outlet					Overall
Pipe Size	Thread Type	Gender	Pipe Size	Thread Type	Gender	Discharge Cap., gpm	Max. Pressure, psi	Ht.	Wd.	Dp.	Max. Temp., °F		Each
Aluminum Bowl—Opaque
1	NPT	Female	1/16	NPT	Female	4.2	300	6 3/4"	5 1/4"	10 3/8"	300°	0000000	0000000
1	NPT	Female	1/8	NPT	Female	4.2	150	6 3/4"	5 1/4"	10 3/8"	300°	0000000	000000

High-Pressure Float-Operated Compressed Air Drain Valves

Able to withstand up to 400 psi, these have the highest pressure rating of all our float-operated drain valves. Also known as drip legs, these drain valves have a float that automatically opens the drain when the bowl begins to fill. Install them at low points in your line after separators, dryers, filters, and aftercoolers.

For technical drawings and 3-D models, click on a part number.

Inlet			Outlet					Overall
Pipe Size	Thread Type	Gender	Pipe Size	Thread Type	Gender	Discharge Cap., gpm	Max. Pressure, psi	Ht.	Wd.	Dp.	Max. Temp., °F		Each
Stainless Steel Bowl—Opaque
1/2	NPT	Female	1/2	NPT	Female	2.2	400	7 1/2"	2 5/8"	2 5/8"	500°	0000000	0000000

Back-Pressure-Operated Compressed Air Drain Valves

When your compressor turns off, it creates back pressure that opens these valves automatically, allowing liquid to escape. Moisture is atomized as it is discharged through the included muffler, eliminating the need for discharge piping. The muffler also minimizes noise. Install drain valves after coolers, separators, dryers, and filters.

For technical drawings and 3-D models, click on a part number.

Drain Valves
Inlet			Outlet					Overall							Replacement Mufflers
Pipe Size	Thread Type	Gender	Pipe Size	Thread Type	Gender	Discharge Cap., gpm	Max. Pressure, psi	Ht.	Wd.	Dp.	Max. Temp., °F	Includes		Each		Each
Steel Housing
3/8	NPT	Female	3/8	NPT	Female	0.4	600	5"	2 5/8"	2 5/8"	220°	Muffler	000000	0000000	000000	000000
1/2	NPT	Female	1/2	NPT	Female	0.4	600	5 1/2"	2 5/8"	2 5/8"	220°	Muffler	000000	000000	000000	00000

No-Air-Loss Compressed Air Drain Valves

Air Powered—1-gpm Capacity

Air Powered—1.5-gpm Capacity

Air Powered—3.5-gpm Capacity

Electric Powered—0.2-gpm Capacity

Electric Powered—2.9-gpm Capacity

Save energy by minimizing the loss of compressed air. Unlike other drain valves, these only open when they're full. They close before the reservoir is completely empty, so no air escapes from the system. Install them at low points in your air line after separators, dryers, filters, and aftercoolers.

Air-powered valves don’t need to be plugged into an electrical outlet. When water raises the float to a set point, these valves open. They have a simple internal design and large openings to prevent clogs. Drain valves with an air pilot require an additional line of air to operate. Install a 5-micron particle filter (sold separately) before the 1- and 3.5-gpm capacity valves.

Electric-powered valves have a sensor. When condensate inside the valve rises to the level of the sensor, the valve opens to drain. Valves detect when they’re blocked—they automatically open and close to attempt to remove the blockage and sound an alarm if they’re still blocked. Drain valves with a contact for remote signaling device can be wired to activate a remote alarm if blocked.

Inlet			Outlet						Air Pilot			Overall
Pipe Size	Thread Type	Gender	For Tube ID	Pipe Size	Thread Type	Gender	Discharge Cap., gpm	Max. Pressure, psi	Pipe Size	Thread Type	Gender	Ht.	Wd.	Dp.	Max. Temp., °F	Features		Each
Aluminum Housing
Air Powered
1/2	NPT	Female	__	1/2	NPT	Female	1	200	1/8	NPT	Female	7 3/8"	8 1/4"	5 7/8"	130°	Resevoir Window	0000000	0000000
1/2	NPT	Female	__	1/2	NPT	Female	1.5	170	1/4	NPT	Female	11"	9 1/4"	10 1/2"	130°	Clear Resevoir, Particle Filter	0000000	000000
3/4	NPT	Female	__	1/2	NPT	Female	3.5	250	1/8	NPT	Female	8 1/2"	13 5/8"	9 1/8"	180°	Clear Resevoir	0000000	00000000
Electric Powered, 120V AC—Hardwire
1/2	NPT	Female	1/4"	__	__	Male	0.2	230	__	__	__	2 7/8"	4 7/8"	3 5/8"	120°	Alarm	0000000	000000
Electric Powered, 120V AC—Three-Prong Plug
1/2	NPT	Female	3/8"	1/4	NPT	Male	2.9	230	__	__	__	4 1/2"	3 3/8"	7"	120°	Alarm, Contact for Remote Signaling Device	0000000	000000