The temple priests perform the puja (rituals) during festivals and on a daily basis. Like other Shiva temples of Tamil Nadu, the priests belong to the Shaiva community, a Brahmin sub-caste.
The temple rituals are performed six times a day; Ushathkalam at 5:30 a.m., Kalasanthi at 8:00 a.m., Uchikalam at 10:00 a.m., Sayarakshai at 5:00 p.m., Irandamkalam at 7:00 p.m. and Ardha Jamam at 8:00 p.m.
Each ritual comprises four steps: abhisheka (sacred bath), alangaram (decoration), naivethanam (food offering) and deepa aradanai (waving of lamps) for both Vanchinadha swamy and Mangala Nayagi.

The temple tank
The worship is held amidst music with nagaswaram (pipe instrument) and tavil (percussion instrument), religious instructions in the Vedas (sacred texts) read by priests and prostration by worshippers in front of the temple mast.
There are weekly rituals like somavaram (Monday) and sukravaram (Friday), fortnightly rituals like pradosham and monthly festivals like amavasai (new moon day), kiruthigai, pournami (full moon day) and sathurthi.
During the Tamil month of Kaarththigai (Nov-Dec), Theerthavari (sacred water splash) is conducted in the Guptha Gangai (temple tank) on all Sundays. It also includes a ten-day festival and a car festival at the end of the month.

Appar, the 7th century Tamil saivite saint poet and nayanar has revered Kumbeswarar and the temple in his verses in Tevaram, compiled as the Fifth Tirumurai.
As the temple is revered in Tevaram, it is classified as Paadal Petra Sthalam, one of the 276 temples that find mention in the Saiva canon.
The temple is counted as the seventh in the list of temples in the southern banks of Cauvery. Appar has glorified the temple in nine poems referring the place as Kudamuku and the deity as "Kumbesar".
The mention is found in the 59th poem in the Third Tirumurai by Sambandar and 22nd poem in the Fifth Tirumurai by Appar. This is a sacred tank in which goddess Ganga herself bathes to cleanse herself from the sins.
A holy dip in this tank is equivalent to that of one in Kasi.