Hot water mixing valve

A serviceable mixing valve comprising:

• a valve body including a central conduit extending between a first open end and a second open end, the central conduit defining a mixing chamber;
• a first sleeve insert received in the first open end of the central conduit and partially defining a first passageway to the mixing chamber;
• a second sleeve insert received in the second open end of the central conduit and partially defining a second passageway to the mixing chamber;
• a first end cap closing the first open end of the central conduit;
• a second end cap closing the second open end of the central conduit;
• and
• a shuttle assembly received in the central conduit between the first sleeve insert and the second sleeve insert,
• wherein the shuttle assembly is removable from, and installable into, the valve body through at least one of the first open end or the second open end for servicing or replacement of the shuttle assembly.

A mixing valve comprising:

• a body defining a mixing chamber, a first passageway to the mixing chamber, and a second passageway to the mixing chamber;
• a first sleeve insert at least partially defining the first passageway and including a first valve seat having a first extending lip;
• a second sleeve insert at least partially defining the second passageway and including a second valve seat having a second extending lip;
• and
• a shuttle located in the mixing chamber between the first valve seat and the second valve seat, the shuttle including:
• a stem;
• a first plug carried by the stem and facing the first valve seat, the first plug including a first radially extending flange having a first distal-facing groove and a first proximal-facing groove;
• a second plug carried by the stem and facing the second valve seat, the second plug including a second radially extending flange having a second distal-facing groove and a second proximal-facing groove;
• and
• a seal positioned between the first plug and the second plug and received in the first proximal-facing groove and the second proximal-facing groove,
• wherein the first extending lip is received in the first distal-facing groove when the shuttle is in a first seated position to form a first lip-and-groove seating interface between the first sleeve insert and the first plug, and
• wherein the second extending lip is received in the second distal-facing groove when the shuttle is in a second seated position to form a second lip-and-groove seating interface between the second sleeve insert and the second plug.