Water_Related_Issues_Project_503-17-110__Questions.pdf

Water Related Safety Issues Project 503-17-110 Questions and Answers

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Q3 On drawing 1-P601 HW Riser Diagram , not all floors have sizing shown. Are we to assume the size shown on the lowest floor shown and carry that size to first floor ceiling?

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Q1 In specification 22 07 11 plumbing insulation page 16 pipe insulation schedule , there is no schedule for domestic cold water. Are we required to insulate the cold water? If yes, provide insulation thickness required.

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1Inch.

Existing pipe sizes shall be extracted from the new valve sizes shown on sheets 1-EP10SB through 1-EP108 associated with keynotes P3, P4, and P7. Note that valve sizes on existing piping are approximate and shall be field verified for actual size. See General Plumbing Note 3 on the new work sheets.

Yes. Sizes shown on the lowest floor on sheet 1-P601 shall continue to the point of connection at the bottom of the riser.

The HW riser diagram was shown for clarity purposes in regards to the hot water recirculation loops throughout the main portion of the hospital. A CW riser diagram is not required as part of the scope or to perform this work since that information is already contained within the drawing set.

NOTE: HW/HWR Riser 7 size is as follows:

2-1/2" at the top on the 6th floor After branch piping connections on the 5th floor, the riser reduces to 2".

After branch piping connection on the 4th floor, the riser reduces to 3/4" to the recirculation loop in the basement., All accessible existing domestic water line to be tagged with proper identification and flows arrows.

Q4 Can you provide a CW Riser Diagram with pipe sizes?

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Q2 On the demolition drawings there are no sizes shown for the existing lines to be removed. Due to the large amount of piping to be removed ranging from ½” to 6” piping buy guessing the sizes this could create large escalated cost not needed.

All accessible existing domestic water line to be tagged with proper identification and flows arrows.

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Q6 If this is required, is this only the piping in areas we can see or is this requirement for all existing domestic water piping accessible through out project areas?

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Q5 During walk through it was discussed that any existing domestic water piping not being replaced and shown not already identified and tagged with flow arrows and identification labels the contractor is to properly tag and label this piping

Water Related Safety Issues Project 503-17-110 Questions and Answers

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Q9 Are strap on temperature sensors labeled "T-S" listed on mechanical drawings 1-EP10SB thru 1-EP108?

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Q8 Is Testing, Adjusting and Balancing (TAB) required for this project? If required provide specifications

Q7 Specification 22 05 11-page 16 para 2.8 A state identification for piping is specified in Section 09 91 00 Painting.

There is no specification 09 91 00 provided with documents.

Piping shall be tagged via a label on the piping insulation labeled DOMESTIC COLD WATER DOMESTIC HOT WATER, or DOMESTIC HOT WATER RECIRCULATION for the appropriate system. Valve tags shall be tagged with a chain and brass tag as indicated on the drawings.

Testing, Adjusting, and Balancing is not required as part of the scope of this project.

Yes. Temperature sensors are labeled as T-S throughout the drawing set.

NO INTERRUPTIONS TO THE BUILDING 1 WATER FLOW WILL BE ACCEPTABLE.

CONTRACTOR TO COMPLETE WORK AS REQUIRED ON OFF HOURS AND

WEEKENDS WHEN POSSIBLE AND SHALL PROVIDE TEMPORARY WATER SERVICE

WHEN ANY AND ALL SHUTDOWNS OR INTERRUPTIONS TO THE DOMESTIC

WATER SUPPLY TO THE BUILDING ARE ANTICIPATED. NOTIFY COR PRIOR TO

ANY SHUTDOWNS OR INTERUPTIONS.

ADD THIS NOTE AS A VA DIRECTIVE TO BE ADDED TO THE CONSTRUCTION

DOCUMENTS.

Aug 12