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800 (M2,M3,M4) ½”-2”

800 (M2,M3,M4) ½”-2”. Modification Overview. The original model 800 was produced from 1982-1993. The 800M2 was produced from 1991-1994. The 800M3 (1/2”,3/4” sizes only) was produced from 1991-1994. The 800M4 production began in 1994 and is the current model.

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800 (M2,M3,M4) ½”-2”

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  1. 800 (M2,M3,M4)½”-2”

  2. Modification Overview • The original model 800 was produced from 1982-1993. • The 800M2 was produced from 1991-1994. • The 800M3 (1/2”,3/4” sizes only) was produced from 1991-1994. • The 800M4 production began in 1994 and is the current model. • The 800M4FR was introduced in 1995 and is produced with a float assembly that contains a relief valve that protects the unit against freeze damage. • A lead free (LF) version was introduced in 2010.

  3. Hood Removal • The ½”- ¾” hood is secured by two screws. • The 1”-2” hood is secured by two screws.

  4. Bonnet Removal • The bonnet is threaded into the body and sealed by an o-ring. • There is no spring load.

  5. Float Removal and Service • The float is free once the bonnet has been removed. • Replace the rubber seal by pulling it from the groove on the float.

  6. Check Valve Removal • Check valve is spring loaded. • Remove spring retainer by pressing down and rotating to clear tabs on the body. • Remove spring and poppet.

  7. Check Disc Replacement • Replace the rubber disc by pulling it from the groove on the poppet.

  8. Check Seat Replacement • The check seat is threaded into the body and sealed by an o-ring. ** Note: A special tool is needed to remove the seat.

  9. Reassembly Notes • Reassemble in reverse order. • Place large end of spring down in body. • The guides on the retainer face up. • The guides on the float face up. • Make sure the float spring is centered on the float.

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