A landlord is required by law to maintain his property and everything he supplies within in a proper working order. This has clearly not been done and he has let the property in a state which virtually renders the property inhabitable. It certainly deprives you, the tenants, of your full enjoyment of the property and its facilities for which you are paying.
Put all your issues in writing, the emergency plumbers you have called (was this with the landlord's consent for your own initiative out of desperation?), the work done and any other comments they have made. You should further add that any damage caused by using any of the defective appliances etc. are at the landlord's expense and that you, the tenants, will not be held responsible. Give the landlord a reasonable time (in this case, I would suggest 7 days as you have already been some time with out the facilities) to effect repairs.
Having stated you case in writing, you could then look for some compensation for the loss of the use and enjoyment of said facilities. This would probably be by way of a reduction in your rent during the period of inconvenience. It is not good enough that the landlord let the property in such a poor condition.
Any conversations you have with the landlord (either face to face or over the phone should be confirmed in writing and forwarded to the landlord as soon as possible after the communication. Keep a dated copy of all letters in case you have to make a claim against the landlord at a later date. The art of winning a PRTB adjudication is evidence - evidence that you have requested certain repairs to be effected and the time frame within which the repairs should be completed.
If the landlord fails to remedy the repairs within the stated time frame (baring having to wait for qualified repair technicians or for spare parts) the he may well be in breach of his obligations and if you wished, you would be able to serve him with a 28 day Notice of Termination and move out to a suitable property.
Unfortunately, in Ireland, many businesses close down for about 10 days over the Christmas and New Year and it is one of the worst times of the year to move into a property. Immediately before long weekends are also bad times.