There is a slight discrepancy in your statements. You mention that you obtained a new water connection from HMWSSB. However, you contradict your statement by saying that you wish to obtain a stay order against GMWSSB. As these statements contradict each other, please first clarify whether you are referring to the Gauhati or Hyderabad Municipal Water Supply & Sewerage Board.
Coming to the relevant part of your query, assuming you live in Hyderabad, Rule 26(a) of Andhra Pradesh Building Rules, 2012 mandatorily compels an owner to produce an OC to justify that he is legally residing in the building, Depending upon which part of Hyderabad you reside in, you may need to file for an occupancy certificate application.witth the Greater Hyderabad Municipal Corporation or other relevant corporation within whose territorial jurisdiction you reside in. Whether other houses have the OC or not is wholly irrelevant. You must produce the OC as compliance, if you want an affordable bill at the end of the day.
Once you obtain the OC, please be sure to enter your DPMS File No. Your file details will be displayed & you must save and continue. Press the 'Select document' tab & after attaching all relevant documents (completion notice, building pictures etc), submit the form. The file no will be generated & sent to your registered cell no in OTP format. Pay all process fees. After approval, your OC will be sent to you & you can download it via e-mail or login format. This is only if you are living within GHMC's territorial jurisdiction.
Once you obtain the OC, you can present it before the HMWSSB.Until you obtain it, keep a printout of your application as proof that you have applied for the OC.
It is advisable you follow the procedure based on where you live, as approaching the court for an equitable relief may prove costly & time-consuming process.
For further queries, you may contact at: email@example.com. I shall be more than obliged to guide you through the legal procedure.
Thanks & regards