You have navigated away from PartStock. Return to Partstock

Find a Johnstone Supply Store
Request Account
Contractor Tools

×

HVAC Equipment

Commercial

Single Packaged Units

Split Systems

Manufactured Housing

Evaporator Coils

Furnaces

Installation Accessories

Single Packaged Units

Split Systems

Mini-Split Systems

Field Installed Accessories

Multi-Zone Systems

Single Zone Systems

Variable Capacity Systems

Residential Unitary

Air Handlers & Evaporator Coils

Extended Warranties

Gas Furnaces

Oil Furnaces

Single Packaged Units

Split Systems

Specialty

Evaporative Coolers

Fan Coil Units

Generators

Geothermal Units

Heaters & Furnaces

High Velocity Air Systems

Infrared Heaters

Packaged Terminal Air Conditioners & Heat Pumps

Portable AC

Reverse Cycle Chillers

Room Air Conditioners

Through the Wall Condensing Units & Heat Pumps

Vertical Packaged Units
HVACR Parts

Air Conditioning & Refrigeration Components

Accumulators & Receivers

Capillary Tubing

Condensers & Evaporators

Defrost Heaters

Evaporative Cooler Parts

Expansion Valves

Filter-Driers

Oil Control

Refrigeration Valves

Regulators

Relief Valves

Sight Glasses & Moisture Indicators

Solenoid Valves

Vibration Eliminators

Controls

Air Conditioning & Refrigeration Controls

Commercial Controls

Electrical Controls

Gas Heat Controls

Heat Pump Controls

Misc

Oil Heat Controls

OEM Parts

Blowers & Assemblies

Cabinet Components

Coils

Compressors & Accessories

Controls

Duct Components & Curbs

Electrical Components

Gaskets

Heat Exchangers, Manifolds & Burners

Heat Kits

Ignition Components

Knobs

Miscellaneous

Motors & Motor Accessories

Pressure Switches

Refrigeration Components

Supplies, Parts & Hardware

Thermostats & Sensors

Venting Materials
Hydronics & Plumbing

Equipment

Boiler Accessories

Boilers

Hydronic Heaters

Indirect Storage Tanks

Total Home Systems

Water Heaters

Pumps & Parts

Misc

Parts

Pumps

System Components

Baseboard

Expansion Tanks

Gauges

Radiant Heat Systems

Valves & Controls

Air Elimination & Vents

Backflow Preventers

Ball Valves

Boiler Trim Kits

Check Valves

Immersion

Low Water Cut-Offs

Miscellaneous

Mixing Valves

Other Valves

Pressure Reducing Valves

Pressure Regulators

Radiator Valves

Relays

Relief Valves

Steam Parts

Switches

T&P Valves

Water Feeders

Zone Valves
Motors

Blowers & Draft Inducers

General Purpose Blower

OEM Replacement Draft Inducer Blowers

Motor Accessories

Bearings

Belts

Blower Assembly (Without Motor)

Blower Wheels

Capacitors

Couplings

Drip Shields

Fan Blades

Grounding Ring Accessories

Grounding Rings

Grounding Strap

Mounting Parts

Pulleys & Sheaves

Shafts

Speed Controls

Starters

Tools

Motors

Definite Purpose

General Purpose

HVAC

Misc

Refrigeration
Refrigeration

Compressors

Hermetic

Parts

Scroll

Semi-Hermetic

Oils

Alkylbenzene

Mineral

Oil Accessories

POE

PVE

System Treatments

Refrigerant

Accessories

Blends and Specialty

Hydrocarbons

R134A

R134A Alternatives

R22

R22 Alternatives

R32

R404A

R404A Alternatives

R407C

R410A

R454B

Refrigeration Equipment

Air Cooled Condensers

Chillers

Condensing Units

Cooling Towers

Fluid Coolers

Ice Machines & Parts

Refrigerators & Freezers

Unit Coolers

Water Coolers
Supplies

Air Distribution (Grilles, Sheet Metal, etc.)

Diffusers

Ducting & Sheet Metal

Grilles

Misc

Registers

Electrical Installation & Maintenance Supplies

Circuit Breakers

Conduit & Fittings

Cord Caps & Connectors

Extension Cords & Cord Sets

Fuses

Heat Cable

Lighting

Outlet Boxes

Receptacles

Smoke & CO alarms

Switches

Terminals & Connectors

Wall Plates & Covers

Whips

Wire

Wiring Accessories

Installation & Maintenance Supplies

Adhesives

Batteries

Brazing & Soldering Supplies

Caulking & Sealants

Chimney Liner

Cleaners & Chemicals

Condensate Drain Supplies

Condensate Pans

Condensate Pumps

Condensing Unit Pads & Covers

Fittings

Hose Clamps

Insulation

Line Sets

Misc

Mounting Supplies

Pipe

Tapes

Water Filtration
Testing, Tools & Training

Test Instruments

Airflow Measurement

Carbon Monoxide Detectors

Combustion Analyzers

Leak Detectors

Meters

Pressure Measurement

Specialty Test Instruments

Temperature & Humidity Measurement

Tools

Brazing & Soldering Tools

Coil And Tube Cleaning Tools

Flashlights

Hand Tools

Inspection Tools

Ladders

Plasma Cutters

Power Tools

Pressure Washers

Refrigeration & AC Tools

Rope & Tie Downs

Safety

Sheet Metal Machinery

Tool Storage

UV Leak Detectors

Vacuums

Training

Books

Marketing Materials

Software
Thermostats

Accessories

Connected

Thermostat Guards

Thermostats

Connected Thermostats

Digital Non Programmable Thermostats

Digital Programmable Thermostats

Line Volt Thermostats

Mechanical Thermostats
Ventilation & IAQ

Indoor Air Quality (IAQ)

Air Cleaners

Air Filtration

Dehumidification

Heat & Energy Recovery Ventilation

Humidification

Misc

Ultraviolet

Zoning

Ventilation

Air Curtains

Belt Drive Ventilators

Direct Drive Ventilators

Exhaust & Supply Fans

Make-Up Air Ventilators

Power Venters

Radon Blowers & Accessories

Roof & Foundation Ventilators

Ventilation Accessories

Ventilation Dampers

HVACR Parts Air Conditioning & Refrigeration Components Sight Glasses & Moisture Indicators

Search within 61 results

×

HVACR Parts26748
Supplies13970
HVAC Equipment9146
Motors6343
Refrigeration5682
Hydronics & Plumbing4312
More +

Brand

Emerson Flow Controls31
Sanhua11
Danfoss, Inc.8
Parker Hannifin Corporation7
A-1 Compressors4

Country of Origin

MEXICO31
CHINA19
UNITED STATES11

61 Results

Popularity Product Name Mfg. Part Number Order Number

View

Sight Glasses & Moisture Indicators, Air Conditioning & Refrigeration Components, HVACR Parts

3/8" Sight Glass Moisture Indicator

B10-091

3/8" Sight Glass Moisture Indicator

Conn. Size: 3/8" ODF; Overall Length: 4-7/8";

Brand: Parker Hannifin Corporation Mfg #: PSG-3S

Catalog Pg.: 1267 View Similar Items

B12-461

Sight Glass

Conn. Size: 3/8" ODF;

Brand: Emerson Flow Controls Mfg #: HMI-1TT3

Catalog Pg.: 1256 View Similar Items

Sight Glass Moisture Indicator

B10-094

Sight Glass Moisture Indicator

Conn. Size: 1/2" ODF; Overall Length: 4-7/8";

Brand: Parker Hannifin Corporation Mfg #: PSG-4S

Catalog Pg.: 1267 View Similar Items

Sight Glass Moisture Indicator

B10-090

Sight Glass Moisture Indicator

Conn. Size: 3/8" SAE M x F; Overall Length: 3-1/8";

Brand: Parker Hannifin Corporation Mfg #: PSG-3MF

Catalog Pg.: 1267 View Similar Items

Sight Glass Moisture Indicator

B10-100

Sight Glass Moisture Indicator

Conn. Size: 5/8" ODF; Overall Length: 4-7/8";

Brand: Parker Hannifin Corporation Mfg #: PSG-5S

Catalog Pg.: 1267 View Similar Items

Sight Glass Moisture Indicator

B10-088

Sight Glass Moisture Indicator

Conn. Size: 1/4" ODF; Overall Length: 4-3/8";

Brand: Parker Hannifin Corporation Mfg #: PSG-2S

Catalog Pg.: 1267 View Similar Items

B12-460

Sight Glass

Conn. Size: 1/4" ODF;

Brand: Emerson Flow Controls Mfg #: HMI-1TT2

Catalog Pg.: 1256 View Similar Items

Sight Glass/Moisture Indicator

B12-462

Sight Glass/Moisture Indicator

Conn. Size: 1/2" ODF;

Brand: Emerson Flow Controls Mfg #: HMI-1TT4

Catalog Pg.: 1256 View Similar Items

Sight Glass/Moisture Indicator

B12-463

Sight Glass/Moisture Indicator

Conn. Size: 5/8" ODF;

Brand: Emerson Flow Controls Mfg #: HMI-1TT5

Catalog Pg.: 1256 View Similar Items

Sight Glass/Moisture Indicator

B13-372

Sight Glass/Moisture Indicator

Conn. Size: 3/8" FxM;

Brand: Emerson Flow Controls Mfg #: AMI-1FM3

Catalog Pg.: 1256 View Similar Items

Moisture Indicator

B21-636

Moisture Indicator

Conn. Size: 3/8" ODF x 3/8" ODF; Overall Length: 4.69";

Brand: Sanhua Mfg #: SG-3-S

Catalog Pg.: 1276 View Similar Items

ZOOMLOCK™ Braze-Free Sight Glass Moisture Indicator

B21-087

ZOOMLOCK™ Braze-Free Sight Glass Moisture Indicator

Conn. Size: 3/8" ODM;

Brand: Parker Hannifin Corporation Mfg #: PSG-3PZK

Catalog Pg.: 987 View Similar Items

Sight Glass/Moisture Indicator

B13-371

Sight Glass/Moisture Indicator

Conn. Size: 1/4" FxM;

Brand: Emerson Flow Controls Mfg #: AMI-1FM2

Catalog Pg.: 1256 View Similar Items

Sight Glass/Moisture Indicator

B12-464

Sight Glass/Moisture Indicator

Conn. Size: 7/8" ODF;

Brand: Emerson Flow Controls Mfg #: HMI-1TT7

Catalog Pg.: 1256 View Similar Items

SGP Sight Glass/Moisture Indicator Solder/Solder

B18-857

SGP Sight Glass/Moisture Indicator Solder/Solder

Description: SGP 10SN; Conn. Size: 3/8" ODF; Overall Length: 4.7;

Brand: Danfoss, Inc. Mfg #: 014L0182

Catalog Pg.: 1283 View Similar Items

Sight Glass/Moisture Indicator

B13-373

Sight Glass/Moisture Indicator

Conn. Size: 1/2" FxM;

Brand: Emerson Flow Controls Mfg #: AMI-1FM4

Catalog Pg.: 1256 View Similar Items

Sight Glass Moisture Indicator

B11-875

Sight Glass Moisture Indicator

Conn. Size: 7/8" ODF; Overall Length: 6-1/4";

Brand: Parker Hannifin Corporation Mfg #: PSG-7S

Catalog Pg.: 1267 View Similar Items

SGP Sight Glass/Moisture Indicator Solder/Solder

B18-858

SGP Sight Glass/Moisture Indicator Solder/Solder

Description: SGP 12SN; Conn. Size: 1/2" ODF; Overall Length: 5.7;

Brand: Danfoss, Inc. Mfg #: 014L0183

Catalog Pg.: 1283 View Similar Items

Moisture Indicator

B21-633

Moisture Indicator

Conn. Size: 1/4" ODF Solder x 1/4" ODF Solder; Overall Length: 3.98";

Brand: Sanhua Mfg #: SG-2-S

Catalog Pg.: 1276 View Similar Items

SGP Sight Glass/Moisture Indicator Solder/Solder

B18-856

SGP Sight Glass/Moisture Indicator Solder/Solder

Description: SGP 6SN; Conn. Size: 1/4" ODF; Overall Length: 4;

Brand: Danfoss, Inc. Mfg #: 014L0181

Catalog Pg.: 1283 View Similar Items

Moisture Indicator

B21-640

Moisture Indicator

Conn. Size: 5/8" ODF x 5/8" ODF; Overall Length: 5.75";

Brand: Sanhua Mfg #: SG-5-S

Catalog Pg.: 1276 View Similar Items

Moisture Indicator

B21-639

Moisture Indicator

Conn. Size: 1/2" ODF x 1/2" ODF; Overall Length: 5.75";

Brand: Sanhua Mfg #: SG-4-S

Catalog Pg.: 1276 View Similar Items

Moisture Indicator

B21-634

Moisture Indicator

Conn. Size: 3/8" SAE Male x 3/8" SAE Male; Overall Length: 3.23";

Brand: Sanhua Mfg #: SG-3

Catalog Pg.: 1276 View Similar Items

Moisture Indicator

B21-631

Moisture Indicator

Conn. Size: 1/4" SAE Male x 1/4" SAE Male; Overall Length: 2.64";

Brand: Sanhua Mfg #: SG-2

Catalog Pg.: 1276 View Similar Items

Previous «
1
2
3
Next»

Showing 1 - 24 of 61

Powered by

Site Search powered by SLI Systems

You must identify your local store and sign in to see local price and availability information and place orders.

Manufacturer Listing SDS Lookup

Johnstone Supply
Our History
Contact Info
Press Releases
Careers

Terms of Use
Privacy Statement
Sales Policy
Store Content Manager
Sitemap

© 2025 Johnstone Supply. All rights reserved.

Filters

Retrieving System...

Retrieving System...

System Selector Help

Indoor Units

Model to Part Search Feedback

Help us improve Model to Part Search by sending feedback.

Model to Part Help

In most cases, it is best to limit your search to the first 6 characters of the model you are looking for.

If you don't see your model, let us know what we are missing.

Select products to compare.

Compare

Cross-Reference Search Help

In most cases, it is best to limit your search to the first 6 characters of the part you are looking for.

If you don't see your part, let us know what we are missing.

Cross-Reference Search Feedback

Help us improve Cross-Reference Search by sending feedback.

Motor Comparison

Mini-Split Selector Feedback

Help us improve the Mini-Split Selector by sending us feedback.

Added to Cart

Sign In

You must identify your local store and sign in to see local price and availability information and place orders.

Invalid Zip/Postal Code

Choose a store near

Username

Username is case-sensitive

Password

Sign in failed. Invalid username or password

Remember me

Sign in is currently disabled - call to contact the store.

If you have trouble signing in, contact your local Johnstone Supply store.

Enter the Store, Username, and Email associated with your account. After we confirm your identity, you will receive a password reminder email.

Getting stores near

Invalid Zip/Postal Code

Choose a store near 15042

Username is case-sensitive

Enter the generated code below for verification

Request Account Forgot password?

Find a Johnstone Supply Store

Find by State

Website Feedback

Your message will be sent to the web support team.

Contact a store directly

Non-Supported Browser

Your browser is not supported.

Please upgrade to the latest version.

For support, contact your local Johnstone Supply.

Notice

As of April 1^st, 2022, Internet Explorer will no longer be supported on the Johnstone ecommerce sites.

Please install a supported browser such as Chrome, Firefox, Microsoft Edge or Safari.

Loading...

Loading…

You have been logged out due to inactivity.

You have been logged out due to inactivity.

Quick Order

Item List
Bulk Entry

Qty

Part Number

Enter one part per line (Part, Qty) Max 200 parts

Add to Product List

Add to New List...

New Product List

List Name *

Description

Add to Folder

Locked Shared with all users linked to the account

Editable Shared with all users linked to the account

Private Only you can see this list

Product(s) Not Processed

General alert message.

Multiple Products Found

Online Ordering

The administrator has indicated that your orders must be approved by your manager.

We've sent your manager an email requesting an approval.

You'll be sent an email once your order has been approved.

Add to Cart

3 products added to the cart successfully.

Unable to add the following products to the cart.

The maximum number of items that may be added to the cart has been reached.

Product Lists

New Product List Manage Lists and Folders

Multiple Products Found