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Midmark M7 High Quality Autoclave Repair Parts

Part #RCS098-842
Midmark Part #002-0247-00

  • Includes Valve Stem, (1) O-ring (Part #RPO306-868), (1) O-ring (Part #RPO307-869, and, (1) packet High Temperature Lubricant (Part #RPL090)
Fits: Fill-Vent Valve sold by Midmark

Some replacement fill/vent valves were replaced with the RPI valve. To make sure You are ordering the correct repair kit, you need to determine which valve you have. Simply follow the directions below to remove the valve stem and look at the size of the 2 o-rings.

If one is smaller than the other, this is the kit you need. If they are the same size, then you need to order the RCS097-841

Model This Part Fits: Midmark M7 Autoclaves

Notes: Fits Only the Midmark Original Fill-Vent Valve!

SERVICE TIP: AllClaveParts offers a less expensive alternative to replacement of the Fill-Vent Valve with this kit. Now you simply replace the valve shaft and o-rings, instead of replacing the entire valve.

Fill / Vent Valve Removal /Installation

Fill/Vent Valve Location

The Fill Vent Is Located Behind The Vent Lever


  1. Remove cover assembly - See Instructions Here

  2. DANGER: Make sure unit is vented and cool before attempting to make repairs. Failure to do so could result in serious injury or burns.

  3. Loosen and disconnect the two compression nuts (1, Figure 4-18) from fittings of fill / vent valve assembly (2).
  4. Disengage closing bracket of fill / vent valve assembly (2) from fill / vent lever (3) by lifting up on back end of fill / vent valve assembly first and then pulling it out of brackets (4).


  1. Remove fitting (1, Figure 4-19) from valve body (2).
  2. While holding nut (3) stationary, unscrew closing bracket (4) from plunger (5).
  3. Remove nut (3) and spring (6) from plunger (5).
  4. Push plunger (5) out of valve body (2).
  5. Remove two o-rings (7 and 8) from plunger (5).
  6. Note The Sizes Of The O-rings - if they are the same size, the repair kit you need is the RCS097-841 (There is also a difference in thread size on the stem: The OEM is 10/32 thread while the valve sold by RPI is 1/4 x 28" thread)
fillvent2 (39K)


  1. Flush all foreign matter out of valve body (2)and off of all components with water.
  2. Coat o-rings (7 and 8) with high temperature lubricant.
  3. Install o-rings (7 and 8) on plunger (5).
  4. Insert plunger (5) into valve body (2).

  5. fillvent1 (39K)
  6. Install spring (6), nut (3), and closing bracket (4) on plunger (5).
    NOTE: The back side of the plunger has a screwdriver slot / allen wrench to assist in adjusting the closing bracket and nut.
  7. Adjust closing bracket (4) until Distance A is approximately 3/16 to 1/4 in. (0.47 to 0.63 cm). Secure closing bracket in position by tightening nut (3) against closing bracket.
  8. Coat threads of fitting (1) with Teflon tape / sealant.
  9. Install fitting (1) on valve body (2).


  1. Install fill / vent valve assembly (2) in brackets (4), making sure fill / vent lever (3) is inserted in slot of closing bracket.
  2. Position tubes (5) and screw compression nuts (1) onto fittings of fill / vent valve assembly (2).
  3. Install cover assembly - See Instructions Here
  4. Test operation of fill / vent valve. If water will not flow or flows very slowly when fill / vent lever is depressed, lengthen Distance A slightly. See Figure 4-19.

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