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The Sims 2: Nightlife only comes with one pumbing object in Buy Mode. Its profile is below.

[edit] Sinks

[edit] Shinytyme Kitchen Sink by Gurglomics

Shinytyme Kitchen Sink by Gurglomics
Price	§300
Need Effects	Hygiene 5
Need Maximum	Hygiene 90 (Wash Hands) Hygiene 25 (Sponge Bath) Hygiene 70 (Bathe Baby)
Room(s)	Bathroom, Kitchen
Community Sort	Miscellaneous, Shopping, Food
Other info	Initial Depreciation: $45 Daily Depreciation: $30 Depreciation Limit: $120 This sink must be placed in a counter.