REMOVAL PIPE SECTIONS.
a. Remove capscrews (1, View J), washer (2) and locknuts (3).
b. Open clamps (4).
c. Remove pipe connecting sections (7) and gaskets (5 and 6).
a. Replace worn or damaged gaskets.
b. Replace damaged clamps.
c. Replace damaged pipe sections.
INSTALLATION PIPE SECTIONS.
Align pipe sections(7) and clamps (4), with gaskets (5 and 6) in place, and secure by tightening capscrews (1), washer
(2) and locknuts (3).
REMOVAL BUTTERFLY BLOCK VALVES.
Loosen tri-clamp studs (1, View K) and pivot studs(1) to open clamps (2) and remove clamps (2) and gaskets (3).
REPAIR BUTTERFLY BLOCK VALVES.
a. Replace worn or damaged gaskets (3).
b. Clean or repair butterfly block valves (4) if necessary (para. 4-47).
Align butterfly block valves (4) with gaskets (3) in place on pipe sections and secure by closing clamps (2) and
tightening wing nuts on studs(1).
REMOVAL DRAIN VALVES.
Typical drain valve installations are shown in Views L thru M.
a. Typical drain valves shown in Views L and M are removed by turning fittings (1) off valves (2) and valves (2) off
nipples or elbows (3). Remove remaining fittings only if necessary to replace.
b. If drain valves have strainers (4, View N) proceed as follows:
(1) Remove fitting (1), valve (2) and fitting (3) from strainer (4).
(2) Turn strainer (4) off drain valve (5).
(3) Remove drain valve (5) from adapter (6).
(4) If necessary, remove adapter (6).
4-190 Change 2