Manx Utilities says its lines have been very busy after "a potential burst" in Douglas.
The properties affected are reported to be in Cronk Y Berry/Glen Park, Governors Hill and Williston.
Manx Utilities said engineers are investigating and updates will be provided as soon as possible.
A company spokesman added: "Our lines are very busy and we apologise if you cannot get through".
Well-known farm in the west up for sale
Pet foodbank needs your help!
How much cash can government raise in 10 days, asks MHK
LegCo considers meeting on a different day
Extra promenade bus facilities would cost estimated £735k
Medieval cross returned home to Royal Chapel
Arbory MHKs in "parasite politicians" spat
Tyson Fury's boxing glove sold for £7k in charity auction