Toilet

Holding tank

https://www.mycarperformance.com.au/silicone-hose-rubber-hoses/silicone-hoses/straight-lengths-silicone-hose/silicone-hose-straight-length-1-metre-length-id-102mm-blue-1.html ($72)

https://www.mycarperformance.com.au/silicone-hose-rubber-hoses/silicone-hoses/90-silicone-hose-elbows/silicone-hose-elbow-90-degree-sse-090-102-blue.html

https://www.mycarperformance.com.au/silicone-hose-rubber-hoses/silicone-hoses/90-silicone-hose-elbows/silicone-hose-elbow-90-degree-sse-090-102-blue.html

or

http://www.vinidex.com.au/products-4/flexible-drainage-systems/stormflex-pipe-fittings/

http://www.stevejones.com.au/stormflex-100mm--p205/


http://www.ebay.com.au/itm/270821249910?_trksid=p2060353.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT


http://www.ebay.com.au/itm/Exhaust-Tube-Pipe-Aluminised-Stainless-Steel-409-304-1-Metre-inc-1-2-3-4-5-/171698192044?var=&hash=item27fa027eac:m:m9KKR89c9jzYEUkw-3feaIg

Gate

http://www.perthirrigation.com.au/listProduct/VALVES,+BOXES/PVC+BALL+VALVES

http://tankdoctor.com.au/online-store/product-list/pvc-gate-valve-90mm/

http://www.bunnings.com.au/421-products-90mm-sliding-gate-valve-_p4815082 ($47)

http://www.ebay.com.au/itm/like/321453598618?limghlpsr=true&hlpht=true&ul_noapp=true&hlpv=2&chn=ps&lpid=107&ops=true&viphx=1

http://www.irrigationstore.com.au/Product/ProductDetail.asp?lngProductID=11624

lid

http://www.jagtrading.com.au/index.php?route=product/product&path=114_148&product_id=324

pump

probably best just to use a simple pump with a hose that you can direct to what you want to wash down

http://www.supercheapauto.com.au/online-store/products/Explore-Caravan-Sink-Pump-Repair-Kit.aspx?pid=220171#Recommendations

tub

add in a standard pvc shower trap (without grill) into something like this:

http://jainbrothers.tradeindia.com/stainless-steel-round-wash-basin-263227.html

http://boatbits.com.au/index.php/caravan-camping-accessories/330mm-oval-plastic-sink.html

Best bet yet

http://www.jagtrading.com.au/index.php?route=product/product&path=114_148&product_id=324

http://www.emberarresta.com.au/online-shop/category/75mm-range/75mm-valve

http://www.mycarperformance.com.au/alloy-stainless-steel-products/alloy/custom-alloy-hose-joiners/102mm-4-od-alloy-pipe-aluminium-tube-300mm-length-aeroflow.html

http://www.mycarperformance.com.au/alloy-stainless-steel-products/alloy/90-alloy-elbows/alloy-90-elbow-ahe-090-102.html

http://www.mycarperformance.com.au/alloy-stainless-steel-products/alloy/custom-alloy-hose-joiners/alloy-polished-pipe-aluminium-tube-75mm-length-102mm-od-1.html

http://www.ebay.com.au/itm/270821249910?_trksid=p2060353.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT