Are there either faucets or heaters in the photo?
No, there are no heaters or faucets.
    src        edge_attr  dst
0     0  to the right of    1
1     0  to the right of   16
2     1   to the left of   19
3     1   to the left of   14
4     1   to the left of    0
5     1   to the left of   13
6     1  to the right of   15
7     1  to the right of   11
8     1  to the right of    6
9     2   to the left of   10
10    2  to the right of    9
11    2        on top of    1
12    4  to the right of   14
13    4  to the right of   19
14    4  to the right of   13
15    5  to the right of   13
16    5  to the right of   10
17    5  to the right of   14
18    6  to the right of   11
19    6   to the left of   16
20    6   to the left of    1
21    7   to the left of   17
22    9        on top of    1
23    9        on top of    6
24    9   to the left of    2
25   10        on top of    1
26   10   to the left of   14
27   10   to the left of    5
28   10  to the right of    2
29   11   to the left of    6
30   11   to the left of    1
31   11   to the left of   16
32   11        on top of   15
33   12  to the right of   20
34   13   to the left of    5
35   13        on top of   19
36   13   to the left of    4
37   13   to the left of   14
38   13  to the right of    1
39   14   to the left of    5
40   14  to the right of   13
41   14   to the left of    4
42   14  to the right of   10
43   14  to the right of    1
44   15   to the left of    1
45   15   to the left of   16
46   16  to the right of    6
47   16   to the left of   19
48   16  to the right of   15
49   16  to the right of   11
50   16   to the left of    0
51   17  to the right of    7
52   19   to the left of    4
53   19  to the right of    1
54   19  to the right of   16
55   20   to the left of   12