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A bathtub plumbing system including a hand-held shower controlled by a compact pressure balanced, volume and temperature controlled mixing valve. The pressure-balancing valve is installed in a bathtub plumbing set having a hand-held shower accessory. The pressure balancing valve receives hot and col

A bathtub plumbing system including a hand-held shower controlled by a compact pressure balanced, volume and temperature controlled mixing valve. The pressure-balancing valve is installed in a bathtub plumbing set having a hand-held shower accessory. The pressure balancing valve receives hot and cold water from hand-held shower water feed pipes coupled to the main hot and cold water inlet pipes, respectively, located upstream of the respective hot and cold water control valves used to supply water to the main faucet. The hand-held shower hot and cold feed pipes are each hydraulically connected to a first respective hot and cold water inlet of a compact pressure-balancing valve. The hand-held shower is hydraulically connected to the outlet of the pressure-balancing valve by a flexible hose. Hot and cold water entering the pressure-balancing valve is mixed therein independently of the hot and cold water supplied to the faucet. A single control valve may therefore be manipulated to supply pressure and temperature balanced water to the hand-held shower.

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A bathtub plumbing system including a hand-held shower controlled by a compact pressure balanced, volume and temperature controlled mixing valve. The pressure-balancing valve is installed in a bathtub plumbing set having a hand-held shower accessory. The pressure balancing valve receives hot and col

A bathtub plumbing system including a hand-held shower controlled by a compact pressure balanced, volume and temperature controlled mixing valve. The pressure-balancing valve is installed in a bathtub plumbing set having a hand-held shower accessory. The pressure balancing valve receives hot and cold water from hand-held shower water feed pipes coupled to the main hot and cold water inlet pipes, respectively, located upstream of the respective hot and cold water control valves used to supply water to the main faucet. The hand-held shower hot and cold feed pipes are each hydraulically connected to a first respective hot and cold water inlet of a compact pressure-balancing valve. The hand-held shower is hydraulically connected to the outlet of the pressure-balancing valve by a flexible hose. Hot and cold water entering the pressure-balancing valve is mixed therein independently of the hot and cold water supplied to the faucet. A single control valve may therefore be manipulated to supply pressure and temperature balanced water to the hand-held shower. ity; and b) a pair of stiles secured to and extending along opposed edges of said core and a pair of rail's secured to and extending along opposed edges of said core, said stiles and said rails formed of resin bonded exfoliated vermiculite having a density exceeding the density of said core. 2. The fire door of claim 1, wherein: a) said stiles and said rails have substantially the same density. 3. The fire door of claim 2, wherein. a) the density of said stiles and said rails is substantially twice the density of said core. 4. The fire door of claim 2, wherein: a) the vermiculite forming said stiles is oriented in a plurality of aligned layers, and said layers are disposed parallel to the associated edge of said core. 5. The fire door of claim 4, wherein: a) the vermiculite forming said rails is oriented in a plurality of aligned layers, and said rail layers are disposed perpendicularly to the layers of said stiles. 6. The fire door of claim 5, wherein: a) said stiles and said rails are formed from less resin than is used to form said core. 7. The fire door of claim 1, wherein: a) said stiles and said rails are adhesively bonded to said core. 8. The fire door of claim 7, wherein: a) said stiles and said rails are bonded to said core by one of a hot melt adhesive, a polyurethane adhesive, and a PVA adhesive. 9. The fire door of claim 1, wherein: a) each of said stiles and one rail has an exposed edge and b) an intumescent material is disposed upon said edges. 10. The fire door of claim 1, wherein: a) at least one of said core edges, stiles or rails has a recess formed therein and extending there along, at least one of said core edges, stiles and said rails has a tenon, and each of said tenons is adapted to be received within an associated recess. 11. The fire door of claim 10, wherein: a) said recess is formed in at least one of said core edges; and b) at least one of said stiles and rails has a tenon. 12. The fire door of claim 10, wherein: a) said recess is formed in at least one of said stiles and rails; and b) at least one of said core edges has a tenon. 13. The fire door of claim 10, wherein: a) said tenons are adhesively bonded to the assorted recesses. 14. The fire door of claim 13, wherein: a) each of said stiles has an exposed edge, and an intumescent material is disposed upon said edges. 15. The fire door of claim 14, wherein: a) said intumescent material is encapsulated. 16. The fire door of claim 15, wherein: a) a protective layer overlies said intumescent material and is secured to the associated stile. 17. The fire door of claim 1, wherein: a) a decorative layer overlies at least one major surface of said core and is secured to said stiles and said rails. 18. The fire door of claim 17, wherein: a) said decorative layer is one of a medium density fiberboard, an embossed medium density fiberboard, hardboard, melamine resin, veneer, particle board and high pressure laminate. 19. The fire door of claim 18, wherein: a) said decorative layer is adhesively secured to said core. 20. The fire door of claim 18, wherein: a) said veneer is spaced from said core. 21. The fire door of claim 19, wherein: a) said stiles and said rails span the thickness of said core. 22. The fire door of claim 1, wherein: a) said core is disposed into at least two subcores, and said subcores are adhesively secured together. 23. The fire door of claim 22, wherein: a) each of said subcores is generally rectangular. 24. The fire door of claim 1, wherein: a) said core is disposed into at least two subcores, said subcores being disposed parallel to one another and spaced apart from one another, said subcores enclosing a space therebetween. 25. A fire door comprising: a) at least a first rectangular core formed of resin bonded exfoliated vermiculite, said core having first and second major surfaces and four peripheral edges; b) a