2
N
T
E
N
A
N
C
E
C
A
U
S
E
S
b
-
P
R
E
S
S
U
R
E
D
E
F
I
C
I
E
N
C
Y
2
-l
ter
shut
of
f
val
ve
cl
osed
5
-A
r
in
the
syst
em.6
-P
e
o
.8-P
ow
e
1
-P
u
n
n
g
.3-l
ter
shut
of
f
val
ve
cl
osed
6
-A
r
in
the
syst
em.7
-
ns
fi
ci
ent
pump
s
on
N
G
a
-
L
A
C
K
O
F
S
U
C
T
I
O
N
A
N
D
P
U
M
P
I
N
G
C
A
P
A
T
Y
C
A
U
S
E
S
s
n
w
th
m
req
5
-O
n
the
int
ake
hose
F
ll
up
t
he
t
ank
w
h
w
o
2
-L
w
n
the
tank
4
-D
lter.
1
-L
o
w
P
T
O
r
p
m
.
7
-W
e
s
.
3
-t
er
par
ti
al
ly
obst
ruct
ed
4
-nt
ake
h
y
obs
ruct
ed
e
F
ll
t
he
tank
wi
th
wat
er
,
open
the
v
fl
ow
w
h
n
the
recomog=109g=18g
