7 Plumbing 7.1 Water Supply 7.1.1. Well. We will, as described at 2.2.2 above, supply a suitable well with pitless adaptor, pump, and pump-control equipment; you shall supply the conduit and pump wiring from the well to the house and the water piping to the house. 7.1.2. Holding Tank. A holding tank, as described at 2.4 above, shall receive the output from the well. The tank shall be equipped with a float valve, which shall control the power to the well pump. The switched power to the pump shall be supplied through the provided conduit described at 7.1.1 above. 7.1.3 House-Supply Pump 7.1.3.1. Pump Requirements. The outflow of the holding tank shall supply a water pump of sufficient capacity to pump at least 5 gpm at any output pressure between 30 and 60 psi. That pump shall be located at the storage-tank output at an elevation relative to the tank and with connecting piping such that it will be supplied from the tank at water levels therein down to not more then 6 inches in the tank. 7.1.3.2. Pressure Switch. A pressure switch shall be mounted on the house supply line at the post-tank pump; that switch shall, when actuated, send power to the house-supply pump. The pressure switch shall be adjusted to turn on at 40 PSI and cut out at 60 psi. It shall also have a low- pressure cutout set at approximately 12 psi and have a manual reset lever or similar facility. 7.1.4 Pressure Tank 7.1.4.1. Type. The pressure tank shall be a Well-X-Trol brand tank of the precharged captive-air/diaphragm type. A pressure-relief valve that can handle the full pressure of the pump shall be provided. 7.1.4.2. Capacity. The tank drawdown (not total capacity) shall be at least equal to the average delivered output from a two-minute run of the house water-supply pump described at 12.4.4 below. 7.1.4.3. Location. The tank shall be located in the Tank Room described at 12.4 below, in reasonable and convenient proximity to the water tank and house-supply water pump. A shutoff valve shall be provided for it as for any water- using fixture, so that it can be removed for maintenance. 7.1.4.4. Pressure Gauge. A 100-pound pressure gauge shall be installed at the pressure-tank output, in a location making reading of the gauge easy. 7.2 House Supply Plumbing 7.2.1. Piping. Hot and cold water as required shall be supplied to all appliances and fixtures indicated on the design plans. 7.2.2. Pipe Size & Material. All internal plumbing shall be with 3/4-inch-diameter copper pipe of Type L, except that the main cold-water supply pipe from the pressure pump shall be of a 1-inch size. 7.2.3. Insulation. All hot-water pipe lines shall be wrapped with closed-cell rubber insulation. 7.2.4 Valves 7.2.4.1. Fixtures. Separate quarter-turn ball shutoff valves of true 3/4-inch capacity shall be provided for each fixture receiving such water supplies. All such valves shall be in the immediate vicinity of such fixtures and shall be readily accessible. Cold- and hot-water valves shall have color-coding or marking to distinguish them. 7.2.4.2. House. A main shutoff valve for the entering water supply shall be provided, located in the Tank Room described at 13.3 below. There shall also be provided a low-point drainage valve such that the house plumbing can thereby be completely drained into the sewer system. 7.2.4.3. Supply. Valves as required by good practice shall be provided at the wellhead and the storage tank, including the pump and pressure tank piping. There shall be a valved drain line in the Tank Room capable of draining the storage tank into the sewer system. 7.2.4.4. Safety. Pressure-temperature safety valves shall be installed where code and good practice require; at a minimum, that shall include the water heater. 7.2.4.5. Outside. A single valve shall be placed in a reasonably accessible location, which valve shall shut off the water supply to all fixtures external to the house proper without affecting the flow to the house itself. 7.3 External Supply Plumbing 7.3.1. Location. Standpipe water-supply fixtures shall be placed about the house; there shall be such a fixture in proximity to each of the four corners of the structure and to the midpoints of the two long walls. No such standpipe shall be placed in front of any window. 7.3.2. Type. All such fixtures shall be freeze-proof types. All shall stand at a height of roughly four feet above grade except the one near the midpoint of the south wall, which shall be of a height lower than the window bottoms. 7.3.3. Irrigation Take-Off. A valved connection to the external water piping shall be provided for future connection to an irrigation system; that connection shall terminate in a connection closed off by a screw-on cap. 7.4 Sewage Plumbing 7.4.1. Drain Runs. All drain plumbing shall run either within the partition in which the supply plumbing runs or under the built-up floor described at 6.3 above; no penetration of the slab shall be allowed. 7.4.2. Stack Location. The house main stack shall exit the house horizontally through the north wall, running within the west partition of the entry-service area; the exit shall be through the smallest possible opening in the wall. Once outside, the pipe shall run vertically, adjacent to and secured to the house wall, through the roof to a height above the roof as required by code and good practice. 7.4.3. Sewer Exit. The house main sewer shall exit through the house north wall just above the sole plate; the line shall be so angled as to run from the house to below grade on a straight line. 7.4.4. Cleanouts. Cleanouts of full pipe size shall be provided at all vertical stands, at the ends of each horizontal run, at each branch connection, and anywhere else required by code or good practice. 7.5 Fixtures & Appliances 7.5.1. Water Heater 7.5.1.1. Capacity. The water heater shall be an electrically powered unit of 50 gallons' capacity. 7.5.1.2. Make. The water heater shall be the "Marathon" model MR50238 electric water heater made by Water Heater Innovations, Inc. (3107 Sibley Memorial Highway; Eagan MN 55121-1604; 800-321-6718) 7.5.1.3. Securing. The water heater shall be secured to the framing in accord with prevailing safety recommendations. 7.5.1.4. Insulation. The water heater shall be wrapped with a suitable fibreglass insulating batt. 7.5.2. Toilets. The toilets shall be Gerber "Ultra Flush" Model 21-302 in their #15 "Almond" color, with brass-finish flush handle. 7.5.3. Bidet. The bidet shall be a Gerber vertical-spray model, in the maker's "Almond" color. 7.5.4 Sinks 7.5.4.1. Kitchen Sink. The kitchen sink shall be a Kohler K-5877-4U "Lakefield" undercounter-mount 4-hole model, in the maker's "Navy Blue" color. 7.5.4.2. Main Bath Sink. The bath sink in the main bathroom shall be a Kohler K-2931-8 "Hexsign" 8-inch-hole self-rimming model in the maker's "Raspberry Puree" color. 7.5.4.3. Guest Bath Sink. The bath sink in the second bathroom shall be a Kohler K-2931-8U "Hexsign" 8-inch-hole undercounter-mount model in the maker's "Almond" color. 7.5.4.4. Laundry-Room Sink. The laundry-room sink shall be a small wall-mount utility sink of any make of reasonable quality. 7.5.4.5. Workshop Sink. The workshop sink shall be a small wall-mount utility sink of any make of reasonable quality. 7.5.5. Faucets 7.5.5.1. Kitchen. The kitchen sink shall be equipped with a Moen model 7215W (which includes sprayer) plus as an accessory two Moen model 3910S liquid dispensers. 7.5.5.2. Bathroom Sinks. The bathroom sinks shall each be equipped with a Moen 4570W lavatory set with Moen 97372W handle inserts. 7.5.5.3. Main Shower. The large shower stall shall be equipped with a Moen model L3175W water-control/showerhead set. 7.5.5.4. Bidet. The bidet shall be equipped with a Moen model 5201W bidet-hardware set with Moen 14708 handle inserts. 7.5.5.5. Second Shower. The small shower stall shall be equipped with a Moen model L3175W water-control/showerhead set. 7.5.5.6. Utility Sinks. The laundry-room and workshop sinks shall have simple, inexpensive faucets of any make. 7.5.6 Shower Enclosures 7.5.6.1. Main Bathroom. The main-bathroom shower stall shall be 6' deep by 4' feet wide with a seat of appropriate dimensions and height across the south wall. The stall shall be custom made and finished with integrally colored concrete of a color selected in consultation with us. 7.5.6.2. Secondary Bathroom. The secondary shower stall shall be an American Reinforced Plastics (8209 Pacific Highway East; Tacoma, WA 98422; (253) 922-5808) Model S-3637 (plain, not simulated tile) 36-inch, one-piece fiberglass unit, in the American Standard "Symphony Blue" color.