Series 1211 Slack Tube® Manometer/Model 1212 Gas Pressure Kit

1211 Handy Roll-Up Manometer with Laboratory Accuracy
Dwyer® Slack Tube® Manometers are as accurate as the finest laboratory "U" gages - yet they are made to roll up compactly for easy carrying and to withstand rough usage.

Simply unroll the Dwyer® Slack Tube® Manometer and set up to read static pressure, vacuum, or differential pressure. Magnetic clips hold it firmly to any steel surface or hang it on a nail. Turn connectors one revolution to open. When the pressure is imposed, add the number of inches one column travels up to the number of inches the other column travels down. When reading is completed turn connectors to seal columns, roll up manometer into compact coil and tuck it away in its plastic case or a tool box. No fluid lost. No loose caps or inserts to lose.

Dwyer® Slack Tube® Manometers cover a wide range of pressure readings from 4-0-4 inches up to 60-0-60 inches. Use them in determining velocity and static pressures, for leakage, fan and blower tests, calibrating control devices, checking gas pressure and many other applications. All models have flexible vinyl-plastic columns and flexible spring steel scale calibrated in inches of water using water; and inches of mercury using mercury. Scale is center-mounted between columns to eliminate parallax error and has a full 2" sliding zero adjustment.

All Dwyer® Slack Tube® Manometers feature exclusive molded nylon tubing connector assemblies with rapid shutoff design in an acrylic plastic top. One turn counter clockwise and the instrument is ready for use. Another turn seals the tubes completely. Molded all-nylon construction makes this assembly corrosion-proof, leak-proof and practically unbreakable. Tubing connectors extend horizontally allowing 360° freedom. Tubes won't bend or pinch off.

All models have over pressure safety traps in the top of both columns to prevent loss of fluid due to over range pressures or surges in pressure.

Slack Tube® Manometers are suitable for intermittent total pressure to 50 psi and vacuum not exceeding 20" Hg. Avoid temperatures above 130°F and continuous high total pressure. Not for use with red gage fluid; use only water or mercury.

1212 Gas Pressure Kit For Servicing Gas Appliances
A handy, complete kit containing a 16" Slack Tube® Manometer,necessary tubing and connection fittings for checking gas pressures in virtually all gas appliances such as water heaters, furnaces, stoves and dryers. Different range manometers may be specified at corresponding prices. Compared to the cost of purchasing items separately the assembly of component parts into kit form represents substantial savings.

What the kit consists of:
   1 - #1211-16 Slack Tube® Manometer, reads pressure to 16" water.
   1 - Carrying case, plastic, 8-1/2" x 7" x 3-1/8".
   1 - 1 oz. Bottle Fluorescein green color concentrate with wetting agent.
   1 - 1/8" pipe thread rubber tubing adapters.
   1 - 1/8" to 1/4" pipe thread bushing.
   1 - 3 ft length 3/16" rubber tubing.
   1 - Rubber tubing adapter to fit standard 7/16" diameter spud.

Click here, if you require a Material Safety Data Sheet for the Fluoroscein Green Concentrate.

Models & Ordering

Filter By

Model Number Description Usually Ships Price Order
1211-12 Manometer, range 6-0-6, 7 oz water or mercury required. Same Day $70.50 Order
1211-120 Manometer, range 60-0-60, 57 oz water or mercury required. Same Day $105.00 Order
1211-16 Manometer, range 8-0-8, 9 oz water or mercury required. Same Day $71.00 Order
1211-24 Manometer, range 12-0-12, 12-1/2 oz water or mercury required. Same Day $75.00 Order
1211-30 Manometer, range 15-0-15, 15 oz water or mercury required. Same Day $78.00 Order
1211-36 Manometer, range 18-0-18, 17-1/2 oz water or mercury required. Same Day $78.50 Order
1211-48 Manometer, range 24-0-24, 22-1/2 oz water or mercury required. Same Day $93.50 Order
1211-60 Manometer, range 30-0-30, 27 oz water or mercury required. Same Day $98.00 Order
1211-72 Manometer, range 36-0-36, 32 oz water or mercury required. Same Day $98.00 Order
1211-8 Manometer, range 4-0-4, 6 oz water or mercury required. Same Day $64.00 Order


Model Number Description Usually Ships Price Code Order
A-126 1 oz dispenser bottle fluorescein green color concentrate. Same Day $9.90 Order
A-202 Rubber latex tubing. 3/16" ID, lengths to 50'. Same Day $0.90 N Order
A-315 Gage connector, shutoff type, for 3/16" rubber tubing. Same Day $13.50 Order
A-332 Brass adapter, 1/8" female NPT to 1/4" male NPT. Same Day $3.00 Order
A-339 Adapter, brass, 1/8" NPT to 3/16" rubber and 1/8" ID plastic tubing. Same Day $3.90 Order
A-401 Plastic carrying case (7-9/16" x 5-7/8" x 2-13/16"). Same Day $26.25 Order
A-413 Steel carrying case for portable draft gages 104-8, 104-10 and 48" and larger Slack Tube® manometers - 18-1/2" x 4-3/8" x 2-1/4". 1-2 Weeks $111.00 Order

Product Literature


Catalog Pages




Can a Slack tube manometer be used for water pressure?
That style of manometer is to be used with air/gases only. If you need something that reads water pressure, you would want to use something like our Series 490.

Photo Downloads

You must be logged in to view this content.
Click here to login to your account.