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Digital Provenance
Digitized materials: physical originals can be viewed in Special Collections and Archives reading room
Publisher
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Transcription
L.A. - Febr. 27/19^7 Operation No. 1. Close gate valve both ends of check valve. Operation No. 2. Remove inspection plate up-stream side of valve. Operation No. 3» Procure a hardwood stick and put through the inspection hole so that contact is as near bottom of disc as possible. Give a sharp rap with hammer on the wood stick and the disc should then come loose. Operation No. ty-. Shine a light in and examine the valve for lime deposits.
