Book 1 - City of St. Petersburg

Domestic Hot Water
For bathrooms on the site, hot water will be generated by a local
point of use storage-type electric water heater. The tank will be
located near the fixtures served to eliminate the requirements for
temperature maintenance.
140º F water will be provided to scullery and rinsing sinks. A
thermostatic mixing valve will reduce the temperature to 120º F
to feed the hand sinks. Floor drains will be provided for general
cleaning purposes.
• Size each heater based on a modified Hunters Curve
and anticipated fixture unit count. Special equipment
demands such as dishwashers shall be added to the
water heater load.
• Size the hot water supply and return lines not to exceed
10°F heat loss. Dead ends shall be limited to 20-ft.
• Provide combination shut-off and balancing valves in the
hot water return circulating lines.
• Provide insulation on all domestic hot water supply,
horizontal cold water piping and return circulation
piping.
All piping shall be insulated per the most stringent requirements
found in the codes and standards referenced in the general
section.
Plumbing Fixtures
All fixtures shall be provided with individual stop valves. Water
closets shall be furnished with flush valves and lavatories will be
provided with electronic faucets.
• Plumbing fixture accessibility clearances, installation and
accessories shall be ADA compliant.
• Plumbing fixtures shall be ultra-low flow water
conserving/saving type fixtures, faucets and valves.
• Plumbing fixtures in public areas shall have motion/
user sensing devices (with manual by-pass) for fixture
operation.
• Drinking fountains shall be provided as indicated on the
architectural plans and as required by Code.
• Scald control systems shall be provided in all showers.
MICHAEL MALTZAN ARCHITECTURE, INC. 3 - 99