Inlet Fittings | McMaster-Carr

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51,321 Products

Fluid Handling

Hose Fittings

Create threaded, barbed, quick-disconnect, and other types of connections between lengths of hose

6,069 products

Hose

Flexible and stronger than tubing; often used to convey liquids and gases under pressure

1 product

Hose Nozzles

Control flow while dispensing water, fuel, hydraulic fluid, coolant, and chemicals

2 products

Tube Fittings

Make threaded, push to connect, barbed, and other types of connections between lengths of tube

15,607 products

Tube Supports

Slip into plastic and rubber tubing to prevent them from collapsing

93 products

Manifolds

Distribute air or fluid to multiple places from a single source; also called headers

637 products

Pipe and Pipe Fittings

Generally thicker and more rigid than tubing for distributing liquids and gases through your facility

14,000 products

Junction Blocks

Organize and separate multiple lines in a pipe system; air and fluid flow through the threaded holes

88 products

Pressure-Regulating Valves

Reduce inlet pressure to a lower outlet pressure to protect sensitive equipment

289 products

Pressure-Relief Valves

Protect equipment by opening at a set pressure and closing when the pressure drops; for repeated use

236 products

Pressure Test Fittings

Create a temporary connection point for gauges and other testing equipment

28 products

Compressed Gas Valves

Check and adjust the pressure of compressed gas in tanks; also known as Schrader valves

2 products

Vacuum-Regulating Valves

Control the amount of air that a vacuum pump draws from your system to maintain vacuum levels

14 products

Pressure-Relief Discs

Rupture at a set pressure or temperature to vent fluid and gas and protect machinery; one-time use

27 products

Flow Sights

Visually confirm flow and inspect liquid color and clarity

152 products

Orifice Valves

Restrict the flow of liquids and gases to precisely control rate and pressure

102 products

On-Off Valves

Start and stop flow through a line

4,222 products

Drain Valves

Vent air or discharge liquids to remove excess fluid from your system

83 products

Diverting Valves

Redirect flow between ports

264 products

Check Valves

Permit flow in only one direction by closing when flow stops or reverses

744 products

Vacuum Breakers

When pressure drops, vents open to prevent suction from drawing liquid back upstream

35 products

Float Switches

Start process equipment such as pumps and motors when the liquid in your tank reaches the float

3 products

Float Valves

Open or close a pipe connection when liquids in a container reach a set level; also known as ballcocks

113 products

Propane Tank Valves

Start and stop the flow of propane from a tank

7 products

Valve Union Fittings

Mating parts join valves to a line for quick connection and removal

34 products

Valve Manifolds

Control flow to multiple points from one source

9 products

Sump Pump Backflow-Prevention Valves

Block dirty water from returning to your sump pump

2 products

Air-Exhaust Valves

Vent or divert exhaust to speed up the operation of air cylinders, actuators, and other equipment

68 products

Flow-Regulating Valves

Maintain the set flow rate of fluid through your system

50 products

Backflow-Prevention Valves

Dual checks stop flow from reversing and contaminating your system

26 products

Directional Control Valves

Manage the flow of fluids to move equipment in air- and hydraulic-powered systems

421 products

Flow-Adjustment Valves

Gradually open and close to control the volume of air and liquids through a line

761 products

Air Vent Valves

Eliminate air pockets from fluid lines to maintain consistent flow and prevent surges

38 products

Air Pulse Valves

Convert continuous flow into bursts that reduce air consumption in dryers and dust collectors

7 products

Sampling Valves

Drain a small amount of fluid for inspection without disrupting flow

9 products

Valve Bodies

Attach to actuators to automatically or manually control flow in your line

16 products

Flow Transmitters

Send flow rate measurements to PLCs, data loggers, and remote displays

84 products

Air Valves

Fill tanks, tires, and other pressurized equipment

23 products

Flow Switches

Turn equipment on or off when flow rate reaches a set point

171 products

Flowmeters

Measure the flow rate of a liquid or gas

1,012 products

Liquid-Level Gauges

Monitor fluid levels in containers

1 product

Float Valve Bodies

Pair with floats and rods to create float valves that meet your needs

61 products

Gear Pumps

Create fixed liquid flow rates to cool engines, power hydraulic equipment, and extract liquids

19 products

Piston Pumps

Move fluids in high-pressure applications, such as testing pipelines, tanks, and valves

3 products

Rotary Vane Pumps

Evenly move water or hydraulic fluids at high pressures in low-flow applications

2 products

Fluid and Air Evacuators

Connect to compressed air to extract oil, coolant, and brake fluid from tanks and brake systems

1 product

Condensate Pumps

Collect and remove condensate from HVAC and refrigeration systems

14 products

Submersible Pumps

Circulate liquids in small tanks, cooling baths, and other low-flow applications

35 products

Differential Pressure and Vacuum Gauges

Show changes in pressure and vacuum to monitor fans, blowers, and filters

2 products

Differential Pressure Gauges

Display the difference in pressure between two points in your air and fluid systems

2 products

Steam Traps

Extract condensation from lines without losing any steam

100 products

Dewatering Pumps

Remove water or sewage water from jobsites and flooded areas without sump pits

23 products

Centrifugal Pumps

Force liquids through pipes or closed circuits for heating and cooling or filling and emptying tanks

17 products

Test Pumps

Force air or liquid through your system to look for leaks; often called hydrostatic test pumps

30 products

Sump Pumps

Drain water and sewage water from sump pits, loading docks, and cooling towers

57 products

Tank Mixing Nozzles

Circulate liquid in tanks to keep solids from settling

8 products

Mixing Valves

Blend hot and cold water, steam, or oil to maintain a set outlet temperature and prevent scalding

277 products

Proportional Mixers

Dilute detergents, sanitizers, coolants, and soluble oils directly from your drum

5 products

Facility and Grounds Maintenance

Toilet Flush Valves

Release water from a plumbing line or toilet tank into the bowl

18 products

Toilet Tank Replacement Parts

Replace parts such as flappers, fill valves, and floats in your toilet tank

2 products

Shower Valves

Control water and regulate temperature to prevent scalding

1 product

Urinal Flush Valves

Release water from a plumbing line into the urinal bowl

19 products

Showers

Hook up to a water supply near a drain for a convenient utility shower

1 product

Drinking Fountain Nozzles

Dispense water from fountains; also known as bubblers

6 products

Garden Hose Nozzles

Control the flow from a garden hose for spraying and washing

23 products

Garden Hose Faucets

Connect garden hose to lines coming from a building or the ground

31 products

Siphon Guns

Spray liquid and air at the same time to produce a mist of liquids or chemicals

22 products

Power Transmission

Air Flow Control Valves

Control the speed of air-powered equipment by adjusting the volume of airflow entering or exiting

292 products

Compressed Air Filter/Regulator Manifolds

Purify air from a single supply and distribute it to multiple locations

4 products

Compressed Air Filter/Regulators

Simultaneously clean air that's running through a system and control its pressure

181 products

Compressed Air Filter/Regulator/Lubricators

Deliver clean, lubricated air at the desired pressure to a component in your line

192 products

Compressed Air Regulator Manifolds

Use a single air supply to meet multiple pressure requirements

20 products

Hydraulic Power Units

Create and supply hydraulic pressure to keep hydraulic systems running

10 products

Air Cylinders

Push and pull loads to do everything from stamping materials to sorting parts on conveyors

12 products

Compressed Air Regulators

Ensure continuous, safe operation of air-powered equipment by controlling air pressure

386 products

Hydraulic Check Valves

Open to allow hydraulic fluid flow in one direction and close when flow stops or reverses

78 products

Air Flow Check Valves

Open to allow air flow in one direction and close when flow stops or reverses

21 products

Hydraulic Flow-Adjustment Valves

Turn the knob to gradually adjust the flow of hydraulic fluid

2 products

Air to Hydraulic Power Units

Power a hydraulic cylinder with air to avoid the setup, cost, and mess of hydraulic fluid

8 products

Lubricating

Oil Dispensing Stations

Connect to a bulk oil container to fill hand-held dispensers

1 product

Grease Fitting Manifolds

Lubricate multiple points with the same amount and type of grease using one grease fitting

3 products

Oil-Dispensing Pumps

Deliver controlled amounts of oil at specific intervals to keep equipment lubricated

7 products

Oil Dispenser Guns

Pair with container-mount dispensers to control the flow of oil

4 products

Coolant Dispensers

Deliver coolant to workpieces with ready-to-use hose and fittings

27 products

Grease-Dispensing Pumps

Automate the flow of grease with air or battery power instead of applying it by hand

4 products

Oil-Dispensing Pump Metering Valves

Add to manual and electric pumps to dispense the right amount of oil to different lubrication points

3 products

Coolant Dispenser Hose and Fittings

Snap together and position to deliver coolant, oil, water, or air in any direction

7 products

Grease Fitting Junction Blocks

Send different types and amounts of grease from multiple grease fittings to lubricate several points

9 products

Material Handling

Jack Pumps

Pump hydraulic oil into jack rams to create hydraulic jacks

3 products

Containers, Storage, and Furniture

Drum Faucets

Control the flow of liquid from drums, tanks, carboys, and other containers

29 products

Building and Machinery Hardware

T-Slotted Framing and Fittings

The most versatile system, attach fittings along the continuous slots to build virtually anything

26 products

Safety Equipment

Shower Station Valves

Replace valves on your shower station

3 products

Fire Post Indicators

Open and close water supply valves for fire systems buried underground or in a wall

2 products

Fire Hydrants

Fight fires in areas around your facility that city-installed hydrants don’t reach

1 product