Sight Glass Connected to Draw-Off Port
Sight Glass Connected to Draw-Off Port Recommended configuration for connecting to an Inlet Port Sight Glass Connected to Draw-Off Port

Deluxe Sight Glass for Draw-Off Port (3/4″ fittings)

(3 customer reviews)


This Sight Glass will measure sap level in your evaporator pan. By maintaining at least 2″ depth in your pan, you will protect both your syrup and your pan from scorching.  This Sight Glass configuration works excellent on pans that have a 3/4″ NPT port.

  • Solid stainless steel base
  • Anti-turbulence orifice to keep the liquid in the sight glass steady even during a rolling boil
  • The glass is fire polished and shatter-resistant
  • The scale can be placed by you to ensure the level is perfectly calibrated
  • Illustrated instruction sheet

NOTE: There are TWO possible configurations with this kit; connecting to either your pan’s Draw-Off Port OR Sap Inlet Port. In either scenario, this Sight Glass kit is intended to work in tandem with parts from your Pan Accessory Kit. Parts that are not bundled within the Sight Glass Kit are ghosted in the images on this page (ie Valves, Close Nipples, Hex Plugs).


The base is solid stainless steel with an anti-turbulence orifice to keep the liquid steady within the sight glass while there is a rolling boil in the pan it is connected to. The glass is fire polished and shatter-resistant. The scale can be placed by you to ensure the level is perfectly calibrated to your pan.

This Sight Glass configuration will still allow you to draw off syrup from this port. You will just have the added benefit of being able to see your pan’s sap level.

NOTE: Always keep your sap level at about 2″ depth to prevent scorching of your syrup and pan. If your Sight Glass indicates that you have 1″ depth, that actually means that you have 1″ OR LOWER, and you should add sap right away.

Instructions for Sight Glass on Draw-Off Port



If you do not have a 3/4″ Draw-Off Port, see our Sight Glasses for 1/2″ Draw-Off Ports or Sight Glasses for Float Boxes.



  • Instruction Sheet
  • Fire Polished Glass Tube
  • Measurement Sticker
  • Base Seat with TWO O-Rings
  • ONE 3/4″ Elbow
  • ONE 1/2″ Elbow
  • ONE 3/4″ Tee
  • TWO 2-1/2″ Nipples
    (NOTE: In some kits, one of these nipples may be 3″ length. If so, attach the 3″ nipple to your pan port.)
  • ONE 1/2″ to 3/4″ Transition Nipple

NOTE: You must attach your pan’s existing 3/4″ Ball Valve and Nipple at the bottom of the assembly as shown in the photos above.

Additional information

Connection Options

Connect to Draw-Off Port, Connect to Float Box

3 reviews for Deluxe Sight Glass for Draw-Off Port (3/4″ fittings)

  1. James button jr

    Workmanship was good. Assembly was easy. However to maintain the level in the sight when drawing off you have to have a very small stream. Like a trickle. Open it even more it loses the level. Works great other than that.

    • Angela

      Hi James, thanks for touching base.

      It is best practice to draw off your syrup in long, slow, controlled steams. So it is a good thing that you draw off slowly. That being said, if you do draw off syrup faster, the sight glass will automatically re-level itself as soon as you are done drawing off.

      Alternatively, some folks do like to attach this sight glass on the INLET port of their divided pan rather than the draw-off. This sight glass is very versatile in that way. Perhaps that would address your concern? To attach to the inlet port, simply use your pan’s stainless steel inlet plug at the bottom of the sight glass assembly’s “T” fitting. That way you can keep your draw-off valve at the draw off port. You can see what this looks like in this Facebook Live Video we shot this year:

  2. Jerome P

    This is a MUST HAVE. There is no other good way to monitor the depth with all that boiling and steam in the pan.

  3. Steve H

    Ka zow! Ask me my depth. I know it now. How you like dat?

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