Tensions are growing within Fine Gael and Labour. See also this video of a protest against Hogan in Waterford.
Environment Minister Phil Hogan has denied any rift between the coalition partners over the introduction of water charges.
It follows reports of anger among Labour TDs over the way in which the scheme was announced, which has led to confusion among householders.
Some of the party's backbenchers believe the charge was deliberately announced by the Fine Gael Minister to coincide with the Labour Party conference.
Minister Hogan said there was a lot of misinformation "out there" about the meters, but he insisted the coalition was in agreement on the issue.
"I haven't noticed any divisions," he said. "There was a unanimous agreement by the Government...to sanction the role of Bord Gais as the semi-state company that's going to roll out our water provision in the future."
He also said Bord Gais would submit an implementation plan on water provision in the next few weeks.